Best Water Softener for Temecula, CA — 17 Things to Know BEFORE You Buy!

Written by Craig "The Water Guy" Phillips

1. The Local Water Problem in Temecula, CA

Walk into any appliance repair shop in Temecula and ask the technician what kills water heaters fastest in this city. The answer won't surprise longtime residents: it's the relentless 13.2 grains per gallon (GPG) of calcium and magnesium minerals flowing through every tap, shower, and appliance in town. This level of water hardness places Temecula firmly in the "very hard" category — a classification that transforms your home's plumbing system into a daily battleground against mineral scale.

To understand what 13.2 GPG means for your Temecula home, imagine your water pipes as arteries in a body consuming a high-cholesterol diet. Every gallon of Temecula's municipal water carries 13.2 grains of dissolved calcium and magnesium — minerals that behave like microscopic construction workers, laying down layer after layer of scale deposits on every surface they touch. Within months, these deposits begin choking water flow, coating heating elements, and forming the crusty white buildup residents scrub off faucets and showerheads weekly.

Temecula's water originates from a combination of local groundwater wells and imported supplies from the Colorado River and Northern California, all naturally rich in the limestone and mineral deposits that create this hardness challenge. For the 115,000 residents calling Temecula home, this mineral-heavy water supply translates into accelerated appliance failure, doubled soap consumption, and thousands of dollars in preventable maintenance costs. The city's newer developments in neighborhoods like Redhawk and Wolf Creek may have modern plumbing, but even copper and PEX pipes suffer measurable flow restriction when exposed to 13.2 GPG water for extended periods.

The financial stakes are immediate and compounding. A Temecula household's water heater operates under constant mineral stress — efficiency dropping by 10-15% annually as scale accumulates on heating elements and tank walls. Dishwashers, washing machines, and coffee makers face similar mineral bombardment, with manufacturers increasingly voiding warranties in very hard water areas unless proper water treatment is installed.

2. What 13.2 GPG Does to Your Home

At Temecula's 13.2 GPG hardness level, calcium carbonate scale forms aggressively on any heated surface, creating a thermal barrier that forces appliances to work exponentially harder. Your water heater's heating elements become encased in a mineral jacket that reduces heat transfer by 20-30% within the first 18 months. For a typical 40-gallon electric unit serving a Temecula family, this translates to 150-200 additional kilowatt-hours of electricity consumption monthly — adding $25-35 to your SDG&E bill year-round.

The scale formation process accelerates when Temecula's hard water is heated above 140°F or when it evaporates rapidly in the dry Southern California climate. Calcium and magnesium ions crystallize into calcite formations that bond permanently to metal surfaces, creating concentric rings inside pipes that narrow water flow incrementally. In Temecula's older neighborhoods near Old Town, homes built in the 1980s and 1990s with galvanized steel plumbing show measurable flow restriction within 5-7 years of 13.2 GPG exposure.

Appliance manufacturers have begun factoring water hardness into their warranty terms specifically because of cities like Temecula. Tankless water heater companies including Navien, Rinnai, and Rheem now require annual descaling maintenance in areas exceeding 7 GPG — with some voiding coverage entirely above 12 GPG without documented water treatment. At 13.2 GPG, Temecula residents face potential warranty voidance on their most expensive appliances unless they address the hardness proactively.

The soap and detergent waste reaches alarming levels at this hardness concentration. Calcium and magnesium ions react with soap molecules to form insoluble precipitates — the grey scum that clings to shower walls and leaves clothes feeling stiff and scratchy. A Temecula household uses 3-4 times more laundry detergent, dish soap, and shampoo compared to homes with soft water, creating an annual "hardness tax" of $400-600 for a typical family of four.

Personal care becomes noticeably more challenging as calcium ions strip natural oils from skin and form microscopic deposits on hair shafts. Dermatologists in the Temecula Valley report higher rates of eczema and skin sensitivity complaints, with many cases improving dramatically when patients install whole-house water treatment. The mineral coating on hair prevents moisture absorption, leaving even expensive conditioners unable to penetrate effectively.

Temecula's year-round sunshine exacerbates the spotting and etching problems on glass surfaces. As hard water evaporates from car windshields, patio doors, and shower enclosures, it leaves concentrated mineral deposits that become increasingly difficult to remove. The white spots progress to permanent etching when mineral concentrations exceed 10 GPG — damage that requires professional glass restoration or replacement.

For Temecula homeowners, the annual cost of 13.2 GPG water hardness compounds across multiple categories: $300-450 in additional energy costs, $400-600 in extra soap and detergent purchases, $200-400 in accelerated appliance depreciation, and $150-300 in additional cleaning products and professional services. The total "hard water tax" for a Temecula household ranges from $1,050 to $1,750 annually — making water treatment not a luxury upgrade, but essential home infrastructure protection.

3. Temecula's Specific Contaminant Profile

Beyond the aggressive 13.2 GPG hardness baseline, Temecula residents contend with fluoride and chloramine in their municipal water supply — each compound interacting with the high mineral content in distinct ways that complicate treatment approaches. Understanding these interactions is crucial for Temecula homeowners choosing between different water treatment technologies.

Fluoride in Temecula's Water Supply

Temecula's water treatment facilities add fluoride at approximately 0.7 mg/L (parts per million) as part of California's statewide dental health initiative. This intentional addition means fluoride concentrations remain consistent year-round, unlike naturally occurring contaminants that fluctuate with seasonal groundwater changes. At 13.2 GPG hardness, the high calcium and magnesium content can actually enhance fluoride's precipitation potential, leading to white particulate formation in heated appliances.

Residents notice fluoride's presence most commonly through white spotting on dark-colored appliances and the interior surfaces of dishwashers. When combined with Temecula's hard water, fluoride compounds form calcium fluoride precipitates that appear as chalky white films on glassware and stainless steel. These deposits resist standard cleaning products and often require acidic descaling solutions for removal.

The EPA's maximum contaminant level for fluoride is 4.0 mg/L for health effects and 2.0 mg/L for secondary aesthetic standards. Temecula's 0.7 mg/L addition keeps the city well below regulatory thresholds, though some residents prefer fluoride removal for taste preferences or health concerns. Water softeners, including the SoftPro Elite HE, do not remove fluoride through ion exchange — the fluoride ion carries a negative charge and passes through standard cation exchange resin unchanged. Residents seeking fluoride reduction require a dedicated reverse osmosis system at their drinking water tap.

Chloramine Treatment in Temecula

Temecula transitioned from chlorine to chloramine disinfection in 2018 as part of regional water quality improvements coordinated with the Eastern Municipal Water District. Chloramine (monochloramine) provides more stable disinfection than chlorine, especially important for Temecula's extended distribution system serving growing neighborhoods like Morgan's Run and Harveston. However, chloramine's stability makes it significantly more challenging to remove from water.

Temecula residents describe chloramine's signature "medicinal" or "band-aid" odor, particularly noticeable in morning showers or when filling bathtubs. Unlike chlorine, which dissipates when water sits in an open container, chloramine remains active for days without special treatment. At 13.2 GPG hardness, the mineral content can actually concentrate chloramine's odor and taste as water evaporates, making the disinfectant more noticeable in appliances like coffee makers and ice machines.

Chloramine poses specific concerns for Temecula residents with fish tanks or aquariums — the compound is toxic to fish, reptiles, and amphibians at any concentration. Standard activated carbon filters cannot reliably remove chloramine; only catalytic carbon media provides effective reduction. Pet owners in Temecula's family-oriented neighborhoods must either use bottled water for sensitive animals or install appropriate filtration systems.

The SoftPro Elite HE removes calcium and magnesium minerals but does not address chloramine through standard ion exchange processes. Temecula homeowners seeking chloramine reduction should consider pairing their water softener with a whole-house catalytic carbon filter system designed specifically for monochloramine removal. This two-stage approach addresses both the 13.2 GPG hardness and the disinfectant taste/odor concerns simultaneously.

4. Why Most Temecula Homeowners Pick the Wrong Softener

After reviewing hundreds of water treatment installations across Temecula neighborhoods, four critical mistakes emerge repeatedly — errors that leave homeowners with expensive systems that fail to handle the city's demanding 13.2 GPG water profile effectively.

Mistake 1: Buying on Price Alone

Temecula's 13.2 GPG hardness exhausts water softener resin beds faster than moderate hardness levels, making system capacity the most important specification. A 24,000-grain unit that performs adequately in a 5 GPG city will regenerate every 2-3 days under Temecula's mineral load, creating constant maintenance and salt consumption issues. Many Temecula residents purchase undersized units from big-box stores, only to discover the system cannot keep up with their household's daily demand within weeks of installation.

The false economy becomes apparent quickly: an undersized softener operating under continuous stress consumes 40-60% more salt, regenerates more frequently, and experiences premature resin failure. For a Temecula household, the difference between a properly sized system and a bargain unit translates to $200-400 annually in additional operating costs.

Mistake 2: Confusing Softeners with Comprehensive Filters

Water softeners exclusively remove calcium and magnesium through ion exchange — they do not address fluoride or chloramine present in Temecula's municipal supply. Residents expecting their softener to eliminate the medicinal taste and odor from chloramine treatment discover that soft water still carries the disinfectant compounds unchanged. This leads to disappointment and often motivates expensive system returns or additions.

Temecula homeowners dealing with multiple water quality issues need a clear understanding of which problems require separate treatment technologies. A softener plus a catalytic carbon filter addresses both hardness and chloramine, while drinking water concerns about fluoride require point-of-use reverse osmosis regardless of the whole-house treatment approach.

Mistake 3: Ignoring Grain Capacity Mathematics

The sizing formula for Temecula's 13.2 GPG water requires precise calculation, yet many residents guess or rely on generic recommendations. The correct approach: [household members] × 75 gallons per person daily × 13.2 GPG = daily grain removal demand. For a 4-person Temecula family: 4 × 75 × 13.2 = 3,960 grains daily, or 27,720 grains weekly. Adding a 20% buffer for high-usage periods brings the requirement to 33,264 grains — clearly demanding a 48,000-grain capacity system for optimal 5-7 day regeneration cycles.

Residents who skip this calculation often end up with systems that regenerate every 3-4 days, dramatically increasing salt consumption and reducing resin life expectancy.

Mistake 4: Overlooking Salt Efficiency Technology

At Temecula's 13.2 GPG hardness level, an inefficient softener can consume 8-12 bags of salt monthly compared to 4-6 bags for a high-efficiency model serving the same household. Over a 10-year service life, this difference compounds to thousands of pounds of additional salt and hundreds of dollars in Temecula's competitive retail market. Modern demand-initiated regeneration (DIR) technology adjusts salt dosing based on actual resin exhaustion rather than fixed timers, delivering 30-50% salt savings in very hard water applications.

What to Do Next: Test your current water hardness using a home test kit, calculate your household's grain capacity needs using Temecula's 13.2 GPG baseline, and evaluate whether your existing system (if installed) regenerates more often than every 5-7 days — a sign of inadequate capacity or efficiency.

5. The SoftPro Elite HE: Built for Temecula's Water

After evaluating Temecula's water hardness of 13.2 GPG and the presence of fluoride and chloramine in the local supply, one system consistently rises to the top for Temecula homeowners: the SoftPro Elite HE Water Softener.

The SoftPro Elite HE's salt-based ion exchange technology directly addresses Temecula's core problem: physically removing calcium and magnesium minerals that create scale at 13.2 GPG concentrations. Unlike salt-free "conditioners" that only attempt to change mineral crystal structure, true ion exchange replaces hardness minerals with sodium ions — delivering genuinely soft water that prevents scale formation rather than merely delaying it. At Temecula's very hard water level, this distinction becomes critical for long-term appliance protection.

The system's demand-initiated regeneration (DIR) technology adapts automatically to Temecula's high mineral load. Rather than regenerating on fixed schedules that waste salt and water in soft-water cities or under-regenerate in very hard areas, DIR monitors actual resin exhaustion. For Temecula households consuming 13.2 GPG water daily, this ensures consistent soft water delivery while optimizing salt efficiency — typically regenerating every 5-7 days under normal usage patterns.

NSF/ANSI Standard 44 certification verifies the SoftPro Elite HE's resin meets rigorous performance and safety standards. For Temecula residents already managing fluoride and chloramine in their water supply, knowing the ion exchange process itself introduces no additional contaminants provides essential peace of mind. The certified resin maintains structural integrity under the heavy mineral load typical of 13.2 GPG service conditions.

The SoftPro Elite HE offers four grain capacity options — 32,000, 48,000, 64,000, and 80,000 grains — allowing precise sizing for Temecula households. Using the standard formula, a typical 4-person Temecula family requires approximately 33,264 grains weekly, making the 48,000-grain model optimal for consistent 6-day regeneration cycles. Larger households or those with high water usage benefit from the 64,000 or 80,000-grain configurations, extending regeneration intervals and reducing long-term operating costs.

The system's 10-year manufacturer warranty provides Temecula homeowners with protection during the period of heaviest mineral stress. At 13.2 GPG, ion exchange resin processes significantly more hardness minerals annually than systems serving moderate hardness areas — accelerating normal wear patterns. The extended warranty coverage acknowledges this reality while demonstrating manufacturer confidence in the system's durability under demanding conditions.

The SoftPro Elite HE's design accommodates companion filtration systems for addressing Temecula's chloramine concerns. The softener can operate effectively downstream of catalytic carbon filters or upstream of point-of-use reverse osmosis systems, allowing Temecula residents to create comprehensive treatment solutions tailored to their specific water quality priorities. This flexibility prevents the compatibility issues common with proprietary systems that restrict expansion options.

For Temecula households dealing with 13.2 GPG of water hardness and the compounding presence of fluoride and chloramine, the SoftPro Elite HE is not a comfort upgrade — it is infrastructure protection for your home.

Homeowner Checklist: Measure your main water line location, confirm 110V electrical access within 10 feet, identify a suitable drain connection for regeneration discharge, and calculate your household grain capacity needs before selecting your SoftPro Elite HE configuration.

6. How to Size Your Softener for Temecula

Proper sizing for Temecula's 13.2 GPG water requires precise calculation rather than guesswork — undersizing leads to constant regeneration and salt waste, while oversizing increases initial costs unnecessarily. Follow this step-by-step formula to determine the optimal grain capacity for your household:

Step 1: Count household members (include any regular guests or extended family)

Step 2: Multiply by 75 gallons per person per day (standard residential usage)

Step 3: Multiply household gallons × 13.2 GPG = daily grain demand

Step 4: Multiply daily grains × 7 = weekly grain demand

Step 5: Add 20% buffer for high-usage days (laundry, guests, irrigation)

Step 6: Match result to SoftPro Elite HE grain capacity (32K/48K/64K/80K)

For a typical 4-person Temecula household:

4 people × 75 gallons = 300 gallons daily

300 gallons × 13.2 GPG = 3,960 grains daily

3,960 × 7 days = 27,720 grains weekly

27,720 + 20% buffer = 33,264 grains total capacity needed

The 48,000-grain SoftPro Elite HE handles this Temecula household's needs with regeneration every 6 days under normal conditions. This schedule optimizes salt efficiency while ensuring consistent soft water delivery during Temecula's peak summer usage periods when landscape irrigation and pool filling increase household consumption.

Larger Temecula households (5-6 people) or those with hot tubs, large gardens, or frequent entertaining should consider the 64,000-grain capacity for 7-8 day regeneration cycles. The goal is regenerating every 5-7 days for maximum efficiency — more frequent cycles waste salt, while longer intervals risk resin exhaustion and hard water breakthrough.

7. Installation in Temecula: What to Know

Temecula does not require special permits for residential water softener installation, but the city does mandate that electrical connections be performed by licensed electricians in accordance with California building codes. Most homeowners can legally install the plumbing connections themselves or hire a general plumber, making the SoftPro Elite HE accessible for both DIY and professional installation approaches.

The optimal placement follows the standard sequence: after your main water shutoff valve but before the water heater. This positioning treats all water entering your Temecula home while allowing bypass capability for maintenance or emergencies. The system requires a nearby drain connection for regeneration discharge — either a floor drain, laundry sink, or dedicated standpipe meeting California plumbing code requirements for air gaps and backflow prevention.

Temecula's municipal water pressure typically ranges from 45-65 PSI throughout most residential areas, well within the SoftPro Elite HE's operating specifications. Neighborhoods in higher elevation areas like Redhawk or Morgan's Run may experience lower pressure during peak usage periods, but rarely below the 20 PSI minimum required for proper system operation. Homes with private wells should verify adequate pressure and flow rates before installation.

For Temecula's 13.2 GPG hardness level, use only evaporated salt pellets in your brine tank — the highest purity option that minimizes residue buildup and extends resin life. Solar salt crystals contain more impurities that accelerate brine tank cleaning requirements and can compromise resin performance under very hard water conditions. Evaporated pellets cost 15-20% more than crystals but deliver superior long-term results at this hardness level.

Salt consumption at 13.2 GPG averages 40-60 pounds monthly for a typical Temecula household, depending on system capacity and regeneration efficiency. Check salt levels every 2-3 weeks initially to establish your household's consumption pattern, then adjust to monthly monitoring once usage stabilizes. Keep salt levels at least 6 inches above the water line in the brine tank to prevent bridging and ensure proper regeneration cycles.

8. Maintenance Schedule for Temecula Homeowners

Temecula's 13.2 GPG hardness demands more frequent maintenance attention than moderate hardness areas — the high mineral load accelerates salt consumption and increases the potential for resin fouling. Following this schedule protects your investment and ensures consistent soft water delivery:

Monthly Tasks

Check salt levels in the brine tank — consumption runs high at 13.2 GPG, typically requiring 40-60 pounds monthly for average Temecula households. Look for salt bridges, which appear as a hard crust above the water line that prevents proper dissolving during regeneration cycles. Break up any bridges using a wooden handle or plastic rod, never metal tools that could damage the tank.

Verify the bypass valve remains in the "service" position unless you're performing maintenance. The valve handle should align with the pipe direction — parallel means water flows through the softener, perpendicular means bypass mode. Accidental bypass positioning is a common cause of "hard water breakthrough" complaints in Temecula homes.

Quarterly Tasks

Clean the brine tank thoroughly every three months to remove accumulated sediment and salt residue. At 13.2 GPG, mineral deposits build faster than in soft water areas, potentially interfering with proper brine concentration. Use warm water and mild detergent, rinsing completely before refilling with evaporated salt pellets.

Test post-softener water hardness using test strips available at Temecula pool supply stores or home improvement centers. Properly functioning systems should deliver water below 1 GPG — any reading above 3 GPG indicates potential resin exhaustion, salt bridging, or mechanical problems requiring attention.

Annual Maintenance

Perform comprehensive brine tank cleaning and resin bed performance evaluation each year. At Temecula's hardness level, resin gradually loses capacity as mineral deposits accumulate in the bed structure. If post-softener hardness creeps above 1 GPG despite proper salt levels and regeneration timing, the resin may require cleaning with specialized products or replacement.

Audit regeneration cycles to confirm optimal timing and salt dosing. Systems serving 13.2 GPG water should regenerate every 5-7 days under normal usage — more frequent cycles suggest undersizing, while longer intervals risk hard water breakthrough during peak demand periods.

Five-Year Evaluation

Assess resin replacement needs based on output quality and regeneration efficiency. Very hard water cities like Temecula stress ion exchange resin more heavily than moderate hardness areas, potentially requiring resin replacement after 8-12 years instead of the 15-20 year lifespan common in softer water regions.

Professional Tip: Temecula residents should establish baseline hardness readings before installation, then retest monthly for the first quarter to confirm proper system performance and optimal regeneration scheduling.

9. Frequently Asked Questions for Temecula Residents

9. Is Temecula's water at 13.2 GPG dangerous to drink?

Temecula's 13.2 GPG hardness poses no health risks from the calcium and magnesium minerals themselves — these are essential nutrients that many people take as supplements. The EPA classifies hardness minerals as secondary (aesthetic) standards rather than health-based contaminants. However, the scale buildup from very hard water can harbor bacteria in plumbing systems and reduce the effectiveness of disinfection processes, making water treatment beneficial for overall water quality.

10. Will a water softener remove fluoride and chloramine from Temecula's water?

No, the SoftPro Elite HE removes only calcium and magnesium through ion exchange — fluoride and chloramine pass through unchanged. Fluoride removal requires reverse osmosis or activated alumina filtration at the drinking water tap. Chloramine reduction needs catalytic carbon filtration, which can be installed as a separate whole-house system before or after the softener. Many Temecula residents use a softener for hardness plus point-of-use filters for drinking water concerns.

11. How much salt will I use per month in Temecula at 13.2 GPG?

Typical salt consumption ranges from 40-60 pounds monthly for a 4-person Temecula household, depending on water usage and system efficiency. High-efficiency models like the SoftPro Elite HE use approximately 6-8 pounds of salt per regeneration cycle. With regeneration every 5-7 days at 13.2 GPG, expect 4-5 regenerations monthly. Budget $15-25 monthly for evaporated salt pellets at Temecula retail prices.

12. Does Temecula require a permit to install a water softener?

Temecula does not require permits for residential water softener installation, but electrical connections must meet California code requirements. If you're adding new electrical circuits, those require permits and licensed electrician installation. Plumbing connections typically fall under homeowner maintenance rights, though many residents prefer professional installation to ensure proper placement and warranty compliance.

13. Why does soft water feel slippery in the shower?

The slippery sensation results from removing calcium ions that normally prevent soap from lathering effectively. At 13.2 GPG, Temecula's hard water binds with soap to create sticky scum rather than rich lather. Soft water allows soap to work as designed, creating the slick feeling that indicates proper cleaning action. Most Temecula residents adjust within 1-2 weeks and prefer the improved hair and skin condition that follows.

14. How quickly will I see results after installing a softener in Temecula?

Immediate effects include better soap lathering, reduced spotting on dishes, and softer-feeling laundry within the first wash cycle. Scale prevention begins immediately, but existing buildup in water heaters and appliances dissolves gradually over 3-6 months. Skin and hair improvements typically appear within 2-3 weeks as natural oils are no longer stripped by calcium deposits. Energy savings become measurable on your SDG&E bill within 2-3 months as appliances operate more efficiently.

15. Can the SoftPro Elite HE handle Temecula's water without separate filters?

The SoftPro Elite HE effectively addresses Temecula's 13.2 GPG hardness without additional equipment. However, residents concerned about chloramine taste and odor should consider adding catalytic carbon filtration, while those wanting fluoride removal for drinking water need point-of-use reverse osmosis. The softener handles the primary problem — mineral scale — that threatens appliances and plumbing in very hard water areas like Temecula.

16. Recommended Setup for Temecula

For most Temecula households, the optimal water treatment configuration combines the SoftPro Elite HE 48,000-grain softener with strategic point-of-use filtration based on individual preferences. This approach addresses the city's aggressive 13.2 GPG hardness while allowing customized solutions for taste, odor, and specific contaminant concerns.

The base installation sequence: main water line → SoftPro Elite HE softener → distribution throughout the home. Residents bothered by chloramine's medicinal taste can add a whole-house catalytic carbon filter before the softener, while those concerned about fluoride in drinking water benefit from an under-sink reverse osmosis system at the kitchen tap.

For Temecula's newer neighborhoods with PEX plumbing, the softener alone provides excellent protection against scale buildup and appliance damage. Older homes in areas like Rancho California may benefit from sediment pre-filtration if aging pipes contribute particulate matter that could foul the softener resin prematurely.

17. Final Verdict for Temecula

Temecula's 13.2 GPG water hardness demands professional-grade treatment — this is not a city where homeowners can ignore mineral scale and expect appliances to reach normal service lives. The combination of very hard water with fluoride and chloramine creates a complex treatment challenge that rewards residents who address each component systematically rather than hoping for single-system solutions.

The SoftPro Elite HE rises as the clear choice for Temecula's hardness challenge because its demand-initiated regeneration adapts to high mineral loads, its certified resin withstands very hard water stress, and its capacity options allow precise sizing for the city's consumption patterns. Unlike salt-free alternatives that merely delay scale formation, the SoftPro's ion exchange technology eliminates the calcium and magnesium minerals that threaten Temecula appliances daily.

For comprehensive water quality improvement, pair the SoftPro with targeted filtration: catalytic carbon for chloramine concerns, reverse osmosis for fluoride removal at drinking taps. This modular approach prevents the compatibility issues and performance compromises common with all-in-one systems attempting to address multiple water quality challenges simultaneously.

The investment pays dividends immediately through reduced soap consumption, improved appliance efficiency, and softer skin and hair. Long-term benefits include extended water heater life, reduced plumbing maintenance, and protection of Temecula's substantial home values from hard water damage. Check current SoftPro Elite HE pricing and available grain capacities for your household size — the system represents essential infrastructure protection rather than optional luxury in Temecula's mineral-rich water environment.

Like the ancient oaks dotting Temecula's wine country hillsides, your home's plumbing system needs protection from environmental stresses to thrive for decades — and at 13.2 GPG, that protection starts with professional water treatment.