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San Bernardino County, California | Municipal Water Utility Company | Public Service Announcement
Recent testing reveals that Cucamonga Valley Water District's regional water supply may contain concerning levels of contaminants including Butyl benzyl phthalate, Pentachlorophenol, Alachlor (Lasso) and p-Cresol, alongside elevated water hardness measurements. This utility provides San Bernardino County residents with municipal water sourced primarily from Surface water reservoirs.
What's in your tap water?
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US Public Records
Cucamonga Valley Water District Area Details
Area served:
San Bernardino County, California
Population served:
190782
Water source:
Surface water
Phone:
855-654-2893
Address:
10440 Ashford St., Rancho Cucamonga, CA 91730-2799
3date
Contaminants Detected In San Bernardino County, California
1,2-Dibromo-3-chloropropane (DBCP); Arsenic; Bromodichloromethane; Bromoform; Chromium (hexavalent); Dibromochloromethane; Nitrate; Total trihalometha… more
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Cucamonga Valley Water District
Annual Municipal Water Report
List of Municipal Water Contaminants Tested by Cucamonga Valley Water District
Tested But Not Detected:
1,1,1,2-Tetrachloroethane; 1,1,1-Trichloroethane; 1,1,2,2-Tetrachloroethane; 1,1,2-Trichloroethane; 1,1-Dichloroethane; 1,1-Dichloroethylene; 1,1-Dichloropropene; 1,2,3-Trichlorobenzene; 1,2,3-Trichloropropane; 1,2,4-Trichlorobenzene; 1,2,4-Trimethylbenzene; 1,2-Dichloroethane; 1,2-Dichloropropane; 1,3,5-Trimethylbenzene; 1,3-Butadiene; 1,3-Dichloropropane; 1,3-Dichloropropene; 1,4-Dioxane; 17-beta-Estradiol; 2,2-Dichloropropane; 2,3,7,8-TCDD (Dioxin); 2,4,5-TP (Silvex); 2,4-D; 2,4-Dinitrotoluene; 3-Hydroxycarbofuran; 4-Androstene-3,17-dione; Alachlor (Lasso); Aldicarb; Aldicarb sulfone; Aldicarb sulfoxide; Aldrin; Antimony; Asbestos; Atrazine; Barium; Baygon (Propoxur); Bentazon (Basagran); Benzene; Benzo[a]pyrene; Beryllium; Bromacil; Bromobenzene; Bromochloromethane; Bromomethane; Butachlor; Cadmium; Caffeine; Carbaryl; Carbofuran; Carbon tetrachloride; Chlordane; Chlorodifluoromethane; Chloroethane; Chloromethane; cis-1,2-Dichloroethylene; cis-1,3-Dichloropropene; Cobalt; Cyanide; Dalapon; DCPA mono- and di-acid degradates; Di(2-ethylhexyl) adipate; Di(2-ethylhexyl) phthalate; Diazinon (Spectracide); Dibromomethane; Dicamba; Dichlorodifluoromethane; Dichloromethane (methylene chloride); Dieldrin; Dimethoate; Dinoseb; Diquat; Endothall; Endrin; Equilin; Estriol; Estrone; Ethinyl estradiol; Ethyl tert-butyl ether; Ethylbenzene; Ethylene dibromide; Glyphosate; Heptachlor; Heptachlor epoxide; Hexachlorobenzene (HCB); Hexachlorobutadiene; Hexachlorocyclopentadiene; Isopropyl ether; Isopropylbenzene; Lindane; m- & p-Xylene; m-Dichlorobenzene; Mercury (inorganic); Methiocarb; Methomyl; Methoxychlor; Methyl ethyl ketone; Methyl isobutyl ketone; Metolachlor; Metribuzin; Molinate; Monochloroacetic acid; Monochlorobenzene (chlorobenzene); MTBE; n-Butylbenzene; n-Propylbenzene; Naphthalene; Nitrate & nitrite; Nitrite; o-Chlorotoluene; o-Dichlorobenzene; o-Xylene; Oxamyl (Vydate); p-Chlorotoluene; p-Dichlorobenzene; p-Isopropyltoluene; Pentachlorophenol; Perfluorobutane sulfonate (PFBS); Perfluoroheptanoic acid (PFHPA); Perfluorohexane sulfonate (PFHXS); Perfluorononanoic acid (PFNA); Perfluorooctane sulfonate (PFOS); Perfluorooctanoic acid (PFOA); Picloram; Polychlorinated biphenyls (PCBs); Propachlor; sec-Butylbenzene; Selenium; Silver; Simazine; Styrene; tert-Amyl methyl ether; tert-Butylbenzene; Testosterone; Tetrachloroethylene (perchloroethylene); Thallium; Thiobencarb; Toluene; Toxaphene; trans-1,2-Dichloroethylene; trans-1,3-Dichloropropene; Trichloroethylene; Trichlorofluoromethane; Trichlorotrifluoroethane; Vinyl chloride; Xylenes (total)
What's in your tap water?
Discover which substances exceed both Legal Limits and Health Guidelines in your water supply.
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Cucamonga Valley Water District
About Us
During 2017, CVWD collected and analyzed over 40,500 water samples for more than 260 different contaminants. Only substances that were detected appear in the tables within this Statement. If a contaminant isn't listed, it wasn't found in 2017 testing.
The State Water Resources Control Board permits CVWD to monitor certain contaminants less frequently since their concentrations don't fluctuate significantly. While representative, some data may be over a year old. The tables include studies from 2017 unless otherwise indicated.
Table 1 presents contaminants regulated by Primary Drinking Water Standards, which address substances known to pose health risks. Compliance is typically determined by average contaminant levels. If a single test exceeds the Maximum Contaminant Level (MCL), multiple follow-up samples are taken and averaged to determine compliance. This report includes both the detected range (which may occasionally exceed MCL limits) and the average values to demonstrate overall compliance.
Table 2 lists contaminants governed by Secondary Water Standards, which primarily address aesthetic water properties. We've included data on Salt and Hardness levels, which many customers find useful.
Table 3 provides information on unregulated contaminants. Federal and state environmental agencies continuously monitor these substances to determine if future regulation is necessary.
Key Terms:
- Maximum Contaminant Level (MCL): Highest allowable level of a contaminant in municipal water. Primary MCLs are set as close to Public Health Goals as economically and technically feasible.
- Maximum Contaminant Level Goal (MCLG): Contaminant level below which no known health risks exist, established by EPA.
- Public Health Goal (PHG): Contaminant level below which no known health risks exist, established by California EPA.
- Maximum Residual Disinfectant Level (MRDL): Highest permitted disinfectant level, necessary for microbial control.
- Treatment Technique (TT): Required process intended to reduce contaminant levels in municipal water.
For more information on your municipal water, visit the U.S. Environmental Protection Agency:
Cucamonga Valley Water District Drinking Water Company and EPACucamonga Valley Water District Municipal Water Report Information
The Cucamonga Valley Water District (CVWD) is a progressive, forward-thinking organization dedicated to providing exceptional, safe and reliable water and wastewater services while responsibly managing natural and financial resources. CVWD has established itself as one of the region's premier water providers through innovative approaches to addressing local and statewide water challenges.
CVWD's service territory encompasses the City of Rancho Cucamonga, portions of Fontana, Ontario, and Upland, plus unincorporated areas of San Bernardino County. As a special district—an independent unit of local government—CVWD operates efficiently by directly matching service costs with revenue from user fees.
Currently serving a population exceeding 190,000 across a 47-square-mile area, CVWD maintains approximately 48,000 water connections and 37,000 sewer connections, managing an average daily demand of 47 million gallons.
The district's mission centers on providing high-quality, safe, reliable water and wastewater services while practicing responsible stewardship of natural and financial resources. CVWD's vision is built on three essential components: people, service, and water—with each element being crucial to their success.
CVWD's organizational culture emphasizes accountability, open communication, and exceptional customer care. Staff members take responsibility for their actions while seeking innovative solutions to enhance service efficiency. The district promotes transparent communication to improve understanding of operations, and strives to exceed customer expectations through collaborative approaches that deliver service beyond expectations.
Municipal Water Utility Company FAQ
For more information on your municipal water, visit the U.S. CDC:
Cucamonga Valley Water District Drinking Water Company and CDC.. ...
Cucamonga Valley Water District supplies municipal water services to residents of Rancho Cucamonga and surrounding areas in San Bernardino County, California.
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