Is Cucamonga Valley Water District Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: San Bernardino

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

violations on file

still open

Violation	Type	Status	Period
Other	Monitoring	Archived	1987-04-01 → 1987-04-30

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	15000 µg/L 150% of the EPA limit, at the 95th percentile of samples — 10000 µg/L worst single sample: 18758 µg/L	10328/10456	SYR4	2012–2019
1,2-DIBROMO-3-CHLOROPROPANE	0.2900 µg/L 145% of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L worst single sample: 1.8 µg/L	2425/3321	SYR4	2012–2019
TTHM	97.3 µg/L 122% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 160 µg/L	215/249	SYR4	2012–2019
Dibromochloromethane	41.15 µg/L No EPA limit set worst single sample: 60 µg/L	198/250	SYR4	2012–2019
Bromoform	37.93 µg/L No EPA limit set worst single sample: 46 µg/L	195/250	SYR4	2012–2019
Bromodichloromethane	25 µg/L No EPA limit set worst single sample: 50 µg/L	188/250	SYR4	2012–2019
Dibromoacetic Acid	11 µg/L No EPA limit set worst single sample: 14.3 µg/L	170/248	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	18.91 µg/L 32% of the EPA limit 60 µg/L worst single sample: 28 µg/L	164/248	SYR4	2012–2019
Chloroform	22.05 µg/L No EPA limit set worst single sample: 37 µg/L	160/249	SYR4	2012–2019
Dichloroacetic Acid	6.68 µg/L No EPA limit set worst single sample: 12 µg/L	129/248	SYR4	2012–2019
Fluoride	587 µg/L 15% of the EPA limit 4000 µg/L worst single sample: 810 µg/L	123/132	SYR4	2012–2019
Trichloroacetic Acid	8 µg/L No EPA limit set worst single sample: 14 µg/L	93/248	SYR4	2012–2019
Nitrate-Nitrite	710000 µg/L 7100% of the EPA limit, at the 95th percentile of samples — 10000 µg/L worst single sample: 990000 µg/L	61/98	SYR4	2012–2019
Monobromoacetic Acid	1.8 µg/L No EPA limit set worst single sample: 2.2 µg/L	22/248	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	19/19	LCR	2024
Arsenic	5.325 µg/L 53% of the EPA limit 10 µg/L worst single sample: 5.5 µg/L	8/133	SYR4	2012–2019
Barium	116.5 µg/L 5.8% of the EPA limit 2000 µg/L worst single sample: 120 µg/L	8/132	SYR4	2012–2019
Combined Uranium	13.4398 µg/L 45% of the EPA limit 30 µg/L worst single sample: 14.602 µg/L	3/14	SYR4	2014–2017
Copper	70 µg/L 5.4% of the EPA limit 1300 µg/L	1/132	SYR4	2012–2019
Dichloromethane	0.9800 µg/L 20% of the EPA limit 5 µg/L	1/98	SYR4	2012–2019
Picloram	1.4 µg/L 0.3% of the EPA limit 500 µg/L	1/19	SYR4	2013–2019

90 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: VARIAN, CARMEN
Phone: 909-987-2591
Email: [email protected]

Frequently asked questions about Cucamonga Valley Water District

Is Cucamonga Valley Water District tap water safe to drink?

EPA monitoring detected 21 contaminants in Cucamonga Valley Water District's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Cucamonga Valley Water District's water?

EPA monitoring detected Nitrate, 1,2-DIBROMO-3-CHLOROPROPANE, TTHM, Dibromochloromethane, Bromoform, and others. The full list with the level and data source for each is above.

How many people does Cucamonga Valley Water District serve?

Cucamonga Valley Water District reports serving 211,069 people in California, per its EPA record.

Has Cucamonga Valley Water District had any water quality violations?

The EPA has 1 violation on file for Cucamonga Valley Water District, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.