Is Santa Clara Valley Water District Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: Santa Clara

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
TT	Health-based	Resolved	1996-09-01 → 1996-09-30
TT	Health-based	Resolved	1996-09-01 → 1996-09-30
TT	Health-based	Resolved	1996-09-01 → 1996-09-30
TT	Health-based	Resolved	1996-02-01 → 1996-02-29
TT	Health-based	Resolved	1996-02-01 → 1996-02-29
TT	Health-based	Resolved	1996-02-01 → 1996-02-29
TT	Health-based	Resolved	1996-02-01 → 1996-02-29
TT	Health-based	Resolved	1996-02-01 → 1996-02-29
TT	Health-based	Resolved	1996-02-01 → 1996-02-29

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
TTHM	66 µg/L 83% of the EPA limit 80 µg/L worst single sample: 88 µg/L	1743/1743	SYR4	2012–2019
Bromodichloromethane	19.5 µg/L No EPA limit set worst single sample: 31 µg/L	1741/1743	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	25 µg/L 42% of the EPA limit 60 µg/L worst single sample: 59 µg/L	1738/1739	SYR4	2012–2019
Chloroform	18.32 µg/L No EPA limit set worst single sample: 62.8 µg/L	1737/1743	SYR4	2012–2019
Dibromochloromethane	26.3 µg/L No EPA limit set worst single sample: 34.5 µg/L	1730/1743	SYR4	2012–2019
Dibromoacetic Acid	12.1 µg/L No EPA limit set worst single sample: 22.8 µg/L	1654/1739	SYR4	2012–2019
Bromoform	22.4 µg/L No EPA limit set worst single sample: 37.8 µg/L	1619/1743	SYR4	2012–2019
Dichloroacetic Acid	12.065 µg/L No EPA limit set worst single sample: 27.8 µg/L	1548/1739	SYR4	2012–2019
Trichloroacetic Acid	9.6 µg/L No EPA limit set worst single sample: 27.6 µg/L	1012/1739	SYR4	2012–2019
Nitrate	2500 µg/L 25% of the EPA limit 10000 µg/L worst single sample: 3000 µg/L	194/660	SYR4	2012–2019
Bromate	5.746 µg/L 57% of the EPA limit 10 µg/L worst single sample: 13.35 µg/L	147/267	SYR4	2012–2019
Fluoride	705.5 µg/L 18% of the EPA limit 4000 µg/L worst single sample: 760 µg/L	130/318	SYR4	2012–2019
Monobromoacetic Acid	1.6 µg/L No EPA limit set worst single sample: 2.6 µg/L	123/1739	SYR4	2012–2019
Arsenic	4 µg/L 40% of the EPA limit 10 µg/L worst single sample: 6 µg/L	113/317	SYR4	2012–2019
1,1,1-Trichloroethane	1.06 µg/L 0.5% of the EPA limit 200 µg/L worst single sample: 1.3 µg/L	17/319	SYR4	2012–2019
Nitrate-Nitrite	2570 µg/L 26% of the EPA limit 10000 µg/L worst single sample: 2700 µg/L	14/60	SYR4	2012–2019
Monochloroacetic Acid	12.035 µg/L No EPA limit set worst single sample: 19.1 µg/L	10/1739	SYR4	2012–2019
Barium	230 µg/L 12% of the EPA limit 2000 µg/L worst single sample: 260 µg/L	5/317	SYR4	2012–2019
Chromium	11.95 µg/L 12% of the EPA limit 100 µg/L worst single sample: 12 µg/L	2/317	SYR4	2012–2019
Combined Uranium	1.49 µg/L 5% of the EPA limit 30 µg/L	2/44	SYR4	2012–2019
Selenium	12.9 µg/L 26% of the EPA limit 50 µg/L worst single sample: 13 µg/L	2/317	SYR4	2012–2019
Asbestos	0.3900 MFL 5.6% of the EPA limit 7 MFL	1/23	SYR4	2012–2015

60 contaminants tested, none detected

1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Beta Particle ActivityHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: BOGALE, SAM
Phone: 408-630-3505
Email: sbogale@valleywater.org

Frequently asked questions about Santa Clara Valley Water District

Is Santa Clara Valley Water District tap water safe to drink?

EPA monitoring detected 22 contaminants in Santa Clara 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 Santa Clara Valley Water District's water?

EPA monitoring detected TTHM, Bromodichloromethane, Total Haloacetic Acids (HAA5), Chloroform, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Santa Clara Valley Water District serve?

Santa Clara Valley Water District reports serving 0 people in California, per its EPA record.

Has Santa Clara Valley Water District had any water quality violations?

The EPA has 9 violations on file for Santa Clara Valley Water District, of which 9 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.