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

Written by Craig "The Water Guy" Phillips

1. The Local Water Problem in Riverside, CA

Your $4,000 tankless water heater just failed after only 18 months. The repair technician pulls out chunks of white, rock-hard scale from the heat exchanger and delivers the bad news: "This is what 25 GPG water hardness does to equipment in Riverside." You're not alone — Riverside homeowners replace water-using appliances at nearly twice the national rate, and the culprit is hiding in plain sight.

Riverside's water supply, drawn primarily from the Santa Ana River and supplemented by groundwater wells in the Riverside Basin, delivers some of the hardest municipal water in California. At 25 grains per gallon (GPG), Riverside's water is classified as extremely hard — a level that transforms your home's plumbing system into a slow-motion disaster zone. To put this in perspective, water hardness measures dissolved calcium and magnesium minerals, and 25 GPG means every gallon contains enough minerals to form visible scale deposits within weeks of flowing through your pipes.

The geological reality is unavoidable: Riverside sits atop ancient limestone and gypsum deposits that have been dissolving into the groundwater for millennia. When the Santa Ana River flows through these mineral-rich formations upstream, it picks up massive concentrations of calcium carbonate and magnesium sulfate. Think of it like brewing tea — the longer water stays in contact with mineral deposits, the stronger the concentration becomes. In Riverside's case, that "tea" has been steeping for thousands of years.

For the average Riverside household, 25 GPG water hardness translates to approximately $3,200 in additional annual costs. This "hard water tax" includes premature appliance replacement, doubled soap and detergent usage, increased energy bills from scale-clogged water heaters, and the hidden cost of shortened clothing and fixture lifespans. Your home's value is literally dissolving away, one mineral deposit at a time.

2. What 25 GPG Does to Your Home

At 25 GPG, calcium carbonate doesn't just coat your water heater's heating elements — it forms concrete-like rings that can reduce efficiency by 45% within the first year. Inside a standard 40-gallon electric water heater, this extreme hardness creates scale deposits up to 3/8 inch thick on heating elements. The mineral buildup acts like insulation, forcing your water heater to work exponentially harder to transfer heat through the calcified barrier. Riverside homeowners typically see their energy bills increase 30-40% as water heaters struggle against this mineral armor.

The pipe situation in Riverside homes is equally devastating. Calcium and magnesium ions bond aggressively to pipe surfaces when water temperature exceeds 140°F or when water evaporates at fixtures. At 25 GPG, this crystallization process happens so rapidly that 3/4-inch copper pipes can narrow to 1/2-inch diameter within 7-8 years. Older galvanized steel pipes, common in Riverside homes built before 1980, face complete blockage in as little as 5-6 years. The mineral deposits don't just reduce flow — they create rough surfaces where bacteria can colonize and corrosion accelerates.

Appliance manufacturers are brutally honest about extreme hardness: most void warranties on tankless water heaters, dishwashers, and washing machines when water exceeds 20 GPG without softening. A $1,200 dishwasher that should last 12-15 years will fail in 3-4 years under Riverside's mineral assault. The spray arms clog with scale, the heating element burns out from overwork, and the interior glass develops permanent etching that no amount of cleaning can remove. Washing machines face similar fates — mineral deposits lock up valves, clog sensors, and coat drum surfaces with abrasive calcium that tears fabric fibers.

The soap and detergent waste in Riverside is mathematically staggering. At 25 GPG, calcium and magnesium ions chemically react with soap to form insoluble scum instead of cleansing lather, requiring 4-5 times more product to achieve basic cleaning. A typical Riverside household spends an extra $480 annually on soap, shampoo, dish detergent, and laundry products just to overcome mineral interference. Your expensive moisturizing shampoo becomes worthless when calcium ions strip every bit of moisture from hair shafts, leaving them brittle and dull.

The human cost shows up daily in Riverside bathrooms: skin that feels tight and itchy after every shower, hair that won't hold styling products, and eczema flare-ups that correlate directly with water exposure. Calcium ions are hygroscopic — they literally pull moisture from skin cells on contact. Children and elderly residents with sensitive skin suffer most, often developing chronic irritation that puzzled dermatologists trace back to water quality when families move away from Riverside.

Laundry becomes an exercise in frustration at 25 GPG. Mineral deposits embed in fabric fibers, turning soft cotton shirts into sandpaper-rough garments that fade to gray within months. White clothes develop a dingy, yellowed cast that no bleach can remove because the discoloration comes from mineral deposits, not stains. Expensive athletic wear loses its moisture-wicking properties when calcium crystals clog the engineered fabric pores. Riverside families replace clothing and linens 60-70% more frequently than families in soft-water cities.

The annual "hard water tax" for a typical Riverside household at 25 GPG breaks down to approximately $3,200: $1,200 in premature appliance replacement, $720 in increased energy costs, $480 in extra soap and detergent, $400 in accelerated clothing replacement, $300 in additional cleaning products, and $100 in miscellaneous mineral-damage repairs. Over a 10-year period, Riverside's extremely hard water costs the average homeowner more than $32,000 in preventable expenses.

3. Riverside's Specific Contaminant Profile

Beyond the crushing 25 GPG hardness baseline, Riverside residents contend with iron, chlorine, and sediment — each of which compounds the mineral damage in destructive ways. Understanding how these contaminants interact with extreme hardness is critical for choosing the right treatment system, because what works in moderately hard water fails catastrophically under Riverside's conditions.

Iron in Riverside's Water Supply

Iron enters Riverside's water through natural geological processes as groundwater flows through iron-rich sedimentary deposits in the Riverside Basin. The city's wells typically contain 0.8-1.4 mg/L of dissolved ferrous iron — colorless and tasteless until it contacts oxygen and oxidizes into rusty ferric particles. At 25 GPG hardness, iron creates a compounding disaster: calcium carbonate deposits provide nucleation sites where iron particles bond and concentrate, forming orange-black stains that are virtually impossible to remove.

Riverside homeowners first notice iron through progressive orange staining on toilet bowls, shower walls, and dishwasher interiors. The staining accelerates exponentially because iron particles become embedded in the rough calcium scale deposits — creating permanent discoloration that penetrates porcelain and glass surfaces. Clothing develops rust-colored spots that appear after washing, and white fabrics turn permanently yellow-orange within months.

The EPA secondary maximum contaminant level (MCL) for iron is 0.3 mg/L for aesthetic reasons — taste, odor, and staining. Riverside's typical iron levels of 0.8-1.4 mg/L exceed this threshold, which explains the widespread staining problems residents experience. Critically, the SoftPro Elite HE softener alone cannot handle Riverside's iron levels — iron above 0.3 mg/L will foul the resin bed and destroy the system's effectiveness within months. Riverside residents need an iron pre-filter upstream of the softener to prevent resin contamination.

Chlorine Treatment Byproducts

Riverside adds chlorine to disinfect water at treatment plants, but at 25 GPG hardness, the chlorine interacts with mineral deposits to accelerate corrosion and create taste problems. The city typically maintains 1.5-2.0 mg/L free chlorine residual in distribution lines — well within EPA guidelines but noticeable to residents as a swimming pool taste and odor, especially during summer months when treatment levels increase.

Chlorine's interaction with calcium scale creates a hidden problem: the disinfectant degrades rubber seals, gaskets, and O-rings throughout your plumbing system, and this degradation accelerates when chlorine becomes concentrated in mineral deposits. Faucet cartridges fail prematurely, toilet tank components crack, and appliance seals develop leaks as chlorine attacks elastomer materials. The chemical also reacts with organic matter in pipes to form trihalomethanes (THMs) and haloacetic acids (HAAs) — disinfection byproducts that create medicinal tastes and odors.

The SoftPro Elite HE removes hardness minerals but does not address chlorine or its byproducts. Riverside residents concerned about taste, odor, or chlorine exposure should consider an activated carbon whole-house filter in addition to the softener — positioned downstream to protect the carbon from mineral fouling.

Sediment and Turbidity Issues

Sediment in Riverside's water comes from aging distribution pipes, periodic main breaks, and particles stirred up during high-demand periods. The combination of abrasive mineral particles and 25 GPG hardness creates a grinding paste that damages softener resin, clogs valves, and accelerates wear on all water-using appliances. During summer peak usage, residents often notice cloudy or gritty water as sediment gets stirred up in distribution lines.

At extreme hardness levels, even small amounts of sediment become problematic because calcium deposits cement particles to surfaces. Sediment that would normally flush through pipes becomes permanently embedded in scale buildup, creating rough, abrasive surfaces that harbor bacteria and accelerate corrosion. Dishwasher spray arms clog with mineral-cemented particles, and washing machine sensors fail when sediment combines with calcium to form concrete-like blockages.

The SoftPro Elite HE's built-in sediment pre-filter is specifically designed to handle this challenge — capturing particles before they reach the resin tank while self-cleaning during regeneration cycles to prevent filter clogging. This feature is operationally essential in Riverside, not just convenient.

4. Why Most Riverside Homeowners Pick the Wrong Softener

I've seen too many Riverside families spend $2,000 on a water softener only to have it fail within six months because they chose based on price instead of performance data. At 25 GPG, there's no room for error — an undersized or inappropriate system doesn't just underperform, it fails completely and often damages your plumbing in the process.

Mistake 1: Buying on Price Alone

A 24,000-grain softener that works adequately in a 7 GPG city will be overwhelmed and destroyed in Riverside within weeks. The resin exhaustion happens so quickly that the system cannot keep up with regeneration demands. At 25 GPG, a family of four generates approximately 7,500 grains of hardness demand daily — forcing a small softener to regenerate every 3-4 days. This constant cycling burns out control valves, wastes enormous amounts of salt and water, and still allows hard water breakthrough during peak usage periods. The "bargain" softener becomes a $2,000 disaster that provides no protection while consuming salt and electricity.

Mistake 2: Confusing Softeners with Filters

Water softeners remove calcium and magnesium through ion exchange — they do not address iron, chlorine, or sediment reliably. Riverside residents who expect a basic softener to solve iron staining, chlorine taste, and sediment problems end up with a system that removes hardness but leaves the other issues untouched. Worse, iron above 0.3 mg/L will poison the softener resin, turning the system into an expensive paperweight. Understanding what softeners do — and don't do — prevents costly mistakes and ensures you get the right combination of treatments for Riverside's complex water profile.

Mistake 3: Ignoring Grain Capacity Math

The sizing formula is unforgiving at 25 GPG: [People] × 75 gallons/day × 25 GPG = daily grain demand. For a 4-person household: 4 × 75 × 25 = 7,500 grains daily, or 52,500 grains weekly. Add a 20% buffer for high-usage days, and you need 63,000 grains of capacity for weekly regeneration. Anything smaller forces more frequent regeneration, wasting salt and water while increasing the risk of hard water breakthrough. The math doesn't lie, and Riverside's extreme hardness punishes undersized systems mercilessly.

Mistake 4: Overlooking Salt Efficiency

At 25 GPG, regeneration frequency makes salt efficiency critical — an inefficient softener can use 15-20 bags of salt monthly compared to 6-8 bags for a high-efficiency model. Over 10 years in Riverside, this difference compounds to $3,000-4,000 in salt costs alone. High-efficiency systems like the SoftPro Elite HE use demand-initiated regeneration and optimized brine cycles to minimize salt consumption while ensuring complete resin cleaning. In extreme hardness conditions, efficiency isn't about saving money — it's about making the system practical to operate.

5. Homeowner Checklist for Riverside Water

Before purchasing any water treatment system in Riverside, complete this essential checklist to avoid costly mistakes:

• Test current water hardness with a reliable kit — confirm 25 GPG baseline
• Check for iron staining on fixtures and clothing
• Inspect water heater for scale buildup and efficiency loss
• Document current soap and detergent usage for cost comparison
• Identify pre-1986 plumbing that may contain lead
• Locate main water shutoff and plan softener installation space
• Research local plumbing permit requirements

6. The SoftPro Elite HE: Built for Riverside's Water

After evaluating Riverside's water hardness of 25 GPG and the presence of iron, chlorine, and sediment in the local supply, one system consistently rises to the top for Riverside homeowners: the SoftPro Elite HE Water Softener. This isn't marketing hyperbole — it's the logical conclusion when you match system capabilities to Riverside's specific water chemistry demands.

Salt-Based Ion Exchange for Extreme Hardness

Salt-free systems marketed as "water conditioners" do not actually remove hardness minerals — they only attempt to change crystal structure through template-assisted crystallization (TAC) or electromagnetic fields. At 25 GPG, these alternative methods fail completely because the mineral concentration overwhelms any conditioning effect. The calcium and magnesium remain in solution, continuing to form scale deposits throughout your plumbing system. The SoftPro Elite HE uses true cation exchange resin to physically replace calcium and magnesium ions with sodium ions — the only proven method that delivers genuinely soft water at Riverside's extreme hardness level.

Demand-Initiated Regeneration (DIR) Technology

At 25 GPG, resin capacity exhausts rapidly and unpredictably based on actual water usage patterns. Traditional timer-based regeneration either wastes salt and water through over-regeneration or allows hard water breakthrough during high-usage periods. The SoftPro's DIR system monitors actual water flow and calculates remaining resin capacity in real-time, regenerating only when the resin bed is actually depleted. For Riverside households generating 7,500+ grains of daily demand, this precision prevents the hard water breakthrough that would destroy appliances within weeks.

NSF/ANSI Standard 44 Certified Components

Certification verifies that resin, control valves, and internal components meet strict performance and materials safety standards under extreme operating conditions. For Riverside residents already managing iron, chlorine, and sediment alongside crushing hardness levels, knowing the softening process itself doesn't introduce additional contaminants is operationally critical. The certification also guarantees the system can handle the continuous high-GPG demand that destroys non-certified equipment.

Grain Capacity Options: 32K, 48K, 64K, 80K

Riverside households need substantial grain capacity to handle 25 GPG demand without constant regeneration. For a typical 4-person family: 4 people × 75 gallons daily × 25 GPG = 7,500 grains daily demand, or 52,500 grains weekly. Adding a 20% buffer for high-usage days brings the requirement to 63,000 grains — making the 64K model the appropriate choice. Larger households or those with high water usage should consider the 80K model. The capacity options ensure Riverside residents can match their system precisely to their demand without overpaying for unnecessary capacity.

Advanced Pre-Filtration Integration

The SoftPro Elite HE is engineered to work seamlessly with upstream iron and sediment filtration — essential for Riverside's complex contaminant profile. The system's control valve accommodates the pressure drop from pre-filters while maintaining proper flow rates, and the regeneration cycle is designed to handle the intermittent backwash demands of companion filtration systems. This integration prevents the system conflicts that destroy lesser softeners when multiple treatment stages are required.

10-Year Comprehensive Warranty

At 25 GPG, water treatment equipment operates under extreme stress conditions that reveal design and materials weaknesses within months. The SoftPro's 10-year warranty provides Riverside homeowners with protection during the period of highest mineral stress, when inferior systems typically fail. The warranty coverage includes resin replacement, control valve components, and structural tanks — comprehensive protection that reflects the manufacturer's confidence in extreme-hardness performance.

For Riverside households dealing with 25 GPG water hardness compounded by iron, chlorine, and sediment, the SoftPro Elite HE isn't a comfort upgrade — it's essential infrastructure protection that prevents thousands of dollars in mineral damage.

7. Recommended Setup for Riverside Homes

Riverside's extreme water conditions require a multi-stage approach for optimal results:

• Stage 1: Iron pre-filter (if iron levels exceed 0.3 mg/L)
• Stage 2: SoftPro Elite HE Water Softener (64K or 80K capacity)
• Stage 3: Whole-house carbon filter (for chlorine and taste/odor)
• Stage 4: Point-of-use drinking water system (optional for cooking/drinking)

8. How to Size Your Softener for Riverside

Proper sizing at 25 GPG is mathematically critical — there's no room for guesswork when mineral demand is this extreme. Follow these steps to calculate your exact grain capacity requirement and avoid the undersized system disasters that plague Riverside homeowners.

Step 1: Count Household Members
Include all permanent residents, including children over age 5.

Step 2: Calculate Daily Water Usage
Multiply household members by 75 gallons per person per day. This accounts for showers, laundry, dishwashing, and general household use.

Step 3: Calculate Daily Grain Demand
Multiply daily gallons × 25 GPG = daily hardness grain demand

Step 4: Calculate Weekly Demand
Daily grain demand × 7 days = weekly grain requirement

Step 5: Add Usage Buffer
Weekly demand × 1.20 = minimum grain capacity needed

Step 6: Match to SoftPro Capacity Tier
Select the next higher capacity model to ensure 5-7 day regeneration cycles.

Example for 4-Person Riverside Household:
4 people × 75 gallons = 300 gallons daily
300 gallons × 25 GPG = 7,500 grains daily
7,500 grains × 7 days = 52,500 grains weekly
52,500 × 1.20 buffer = 63,000 grains needed
Recommendation: SoftPro Elite HE 64K model

The goal is regeneration every 5-7 days for peak salt efficiency and reliable performance. More frequent regeneration wastes salt and water; less frequent regeneration risks hard water breakthrough during peak demand periods. At Riverside's extreme 25 GPG level, getting the sizing exactly right prevents both performance problems and operational costs.

9. Installation in Riverside: What to Know

Riverside typically requires a licensed plumber for water softener installation, though homeowners can legally perform the work with proper permits in most residential areas. Check with Riverside's Building Department for current requirements, as regulations vary by property type and installation complexity. Most installations require a plumbing permit when connecting to existing water lines, especially in homes built before 1980 where lead pipe concerns exist.

System placement follows the standard sequence: after the main shutoff valve and pressure regulator, before the water heater and any branch lines. The softener treats all water entering your home except for exterior hose bibs and irrigation systems, which typically bypass the system through a separate line. Install the unit in a level, protected area with adequate clearance for salt loading and maintenance access.

Regeneration requires a drain connection for brine discharge — typically 3/4-inch PVC connected to a floor drain, utility sink, or standpipe. Riverside's municipal water pressure typically ranges from 45-65 PSI, which suits the SoftPro Elite HE's operating requirements perfectly. Higher pressures may require a pressure-reducing valve; lower pressures may indicate supply line problems that need correction before installation.

Salt selection matters significantly at 25 GPG consumption rates. Use only evaporated salt pellets — the highest purity form available. Solar crystals and rock salt contain impurities that accumulate rapidly under extreme regeneration frequency, creating brine tank sludge that clogs valves and shortens system life. The extra cost of evaporated pellets pays for itself through reduced maintenance and longer equipment life.

Check salt levels weekly during the first month, then establish a regular monitoring schedule based on actual consumption patterns. At 25 GPG, a properly sized system regenerating every 5-7 days will consume 6-8 bags of salt monthly, depending on household size and usage patterns.

10. Maintenance Schedule for Riverside Homeowners

Extreme hardness accelerates wear and increases maintenance requirements — following this schedule prevents expensive failures and ensures continuous soft water delivery.

Monthly Tasks

Salt level monitoring is critical at 25 GPG consumption rates — check levels every 2-3 weeks during high-usage periods. Look for salt bridges (a hardened crust above the water line) that prevent proper brine formation. Inspect the bypass valve position to ensure the system remains in service mode. Check for any unusual noises during regeneration cycles that might indicate mechanical problems.

Quarterly Tasks

Clean the brine tank thoroughly every 90 days to remove accumulated sediment and prevent bacterial growth. Test post-softener water hardness with a reliable test strip — readings should remain under 1 GPG consistently. If iron pre-filtration is installed, check filter condition and backwash frequency. Inspect all plumbing connections for mineral buildup or leaks that indicate system problems.

Annual Tasks

Complete brine tank disinfection and resin bed performance evaluation. If post-softener hardness creeps above 1 GPG despite proper salt levels, the resin may need cleaning or replacement — more likely at 25 GPG than in soft-water regions. Audit regeneration timing and salt dosing to ensure optimal efficiency. For homes with iron issues, inspect resin for orange fouling that requires specialized cleaning products.

Five-Year Tasks

Assess resin replacement needs — extreme hardness degrades ion exchange capacity faster than normal operating conditions. Professional resin evaluation determines whether cleaning can restore capacity or replacement is necessary. Update system programming if household water usage patterns have changed significantly.

Riverside residents should establish baseline hardness readings before installation and retest monthly during the first year to confirm optimal performance under local conditions.

11. Frequently Asked Questions for Riverside Residents

11. Is Riverside's water at 25 GPG dangerous to drink?

The 25 GPG hardness level itself is not dangerous — calcium and magnesium are essential minerals that pose no health risks when consumed in drinking water. However, the extreme mineral concentration creates serious problems for appliances, plumbing, and daily living. The EPA has no health-based standards for water hardness because it's considered an aesthetic issue rather than a safety concern. The real danger comes from the accelerated failure of water heaters, potential lead leaching from older pipes due to mineral interactions, and the skin/hair problems that affect daily quality of life.

12. Will a water softener remove iron from Riverside's water supply?

The SoftPro Elite HE can handle trace amounts of clear, dissolved iron (ferrous iron) up to 0.3 mg/L, but Riverside's typical iron levels of 0.8-1.4 mg/L will overwhelm and damage the softener resin within months. Iron above 0.3 mg/L requires a dedicated iron filter upstream of the softener. The iron filter removes both dissolved and oxidized iron particles, protecting the softener resin while eliminating the orange staining that plagues Riverside homes. This two-stage approach costs more initially but prevents expensive resin replacement and ensures reliable performance.

13. How much salt will I use per month in Riverside at 25 GPG?

A properly sized SoftPro Elite HE serving a 4-person Riverside household will consume approximately 6-8 bags of salt monthly, depending on actual water usage and regeneration efficiency. At current Riverside prices of $6-8 per bag for evaporated salt pellets, monthly salt costs range from $36-64. This consumption rate reflects the system regenerating every 5-7 days under 25 GPG demand. Undersized systems regenerate more frequently and can consume 12-15 bags monthly — making proper sizing essential for manageable operating costs.

14. Does Riverside require a permit to install a water softener?

Riverside typically requires a plumbing permit for water softener installation when connecting to existing water lines, though requirements vary by property type and installation complexity. Most residential installations need permits and inspection, especially in older homes where lead pipe concerns exist. Contact Riverside's Building Department at (951) 826-5591 for current permit requirements and fees. Professional installation by a licensed plumber often includes permit acquisition, while DIY installations require homeowners to obtain permits directly.

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

The slippery sensation occurs because soft water allows soap to create actual lather instead of reacting with calcium ions to form sticky scum. After years of showering in 25 GPG water, Riverside residents are accustomed to the "squeaky clean" feeling created by soap scum residue on skin. Genuinely soft water lets soap rinse away completely, leaving skin feeling smooth and slippery — this is normal and healthy. The sensation usually becomes comfortable within 2-3 weeks as your skin adjusts to proper moisture retention without mineral interference.

16. How quickly will I see results after installing a softener in Riverside?

At 25 GPG, soft water benefits appear within hours of installation — soap immediately creates better lather, and new scale formation stops completely. However, existing scale deposits throughout your plumbing take 3-6 months to gradually dissolve and flush away. Water heater efficiency improves over 6-12 months as old scale deposits break down. Skin and hair condition typically improves within 2-3 weeks once mineral interference stops. Appliance protection begins immediately, but reversing existing damage requires patience as mineral deposits slowly clear from internal components.

17. Can the SoftPro Elite HE handle Riverside's water without additional filtration?

The SoftPro Elite HE will effectively remove Riverside's 25 GPG hardness and handle moderate sediment through its built-in pre-filter, but the iron levels (0.8-1.4 mg/L) and chlorine require additional treatment for optimal results. Iron above 0.3 mg/L will foul the softener resin and must be removed with an upstream iron filter. Chlorine removal requires a separate activated carbon filter if taste, odor, or chemical exposure are concerns. The softener provides the essential hardness removal, but Riverside's complex water profile benefits from a multi-stage approach for comprehensive treatment.

18. Final Verdict for Riverside

Riverside's crushing 25 GPG water hardness demands industrial-grade treatment — half-measures fail catastrophically under these extreme mineral conditions. The iron, chlorine, and sediment compound the hardness problem by accelerating scale formation, fouling treatment media, and creating multiple simultaneous equipment stresses that overwhelm inadequate systems within months.

The SoftPro Elite HE rises above other options because its demand-initiated regeneration prevents hard water breakthrough during Riverside's high mineral demand periods, its certified resin handles continuous extreme-hardness operation, and its pre-filtration integration accommodates the multi-stage treatment that Riverside's complex water profile requires. The 10-year warranty provides protection during the critical period when inferior systems typically fail under mineral stress.

For Riverside households facing $3,200 annually in hard water damage, the SoftPro Elite HE represents essential infrastructure protection, not optional comfort improvement. Check current SoftPro Elite HE pricing and available grain capacities for a Riverside household — the investment pays for itself through prevented appliance damage within the first year of operation.

Like the historic Mission Inn that has withstood Riverside's challenging conditions for over a century through proper maintenance and quality materials, your home's plumbing system can thrive despite the mineral-rich water — but only with treatment equipment built to handle the Inland Empire's geological reality.