Is City of Sunnyvale Tap Water Safe? Quality Report

Water source: SWP
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

141

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2015-03-01 → 2015-03-31
TT	Health-based	Resolved	2015-03-01 → 2015-03-31
TT	Health-based	Resolved	1995-03-01 → 1995-03-31
TT	Health-based	Resolved	1995-03-01 → 1995-03-31
TT	Health-based	Resolved	1992-03-01 → 1992-03-31
TT	Health-based	Resolved	1992-03-01 → 1992-03-31
TT	Health-based	Resolved	1992-03-01 → 1992-03-31
TT	Health-based	Resolved	1992-03-01 → 1992-03-31
TT	Health-based	Resolved	1992-03-01 → 1992-03-31
TT	Health-based	Resolved	1992-03-01 → 1992-03-31

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
Bromodichloromethane	18.48 µg/L No EPA limit set worst single sample: 28.3 µg/L	247/248	SYR4	2012–2019
TTHM	60.37 µg/L 75% of the EPA limit 80 µg/L worst single sample: 74.8 µg/L	247/248	SYR4	2012–2019
Chloroform	46.925 µg/L No EPA limit set worst single sample: 58.2 µg/L	246/248	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	42.45 µg/L 71% of the EPA limit 60 µg/L worst single sample: 50 µg/L	232/235	SYR4	2012–2019
Trichloroacetic Acid	19 µg/L No EPA limit set worst single sample: 27 µg/L	224/234	SYR4	2012–2019
Dichloroacetic Acid	22 µg/L No EPA limit set worst single sample: 28 µg/L	223/234	SYR4	2012–2019
Dibromochloromethane	26.335 µg/L No EPA limit set worst single sample: 29 µg/L	194/248	SYR4	2012–2019
Bromoform	20.26 µg/L No EPA limit set worst single sample: 30.2 µg/L	165/248	SYR4	2012–2019
Dibromoacetic Acid	12 µg/L No EPA limit set worst single sample: 19 µg/L	152/234	SYR4	2012–2019
Nitrate	6300 µg/L 63% of the EPA limit 10000 µg/L worst single sample: 6460 µg/L	96/96	SYR4	2012–2019
Monobromoacetic Acid	2.075 µg/L No EPA limit set worst single sample: 2.4 µg/L	46/234	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	29/29	LCR	2025
Fluoride	213 µg/L 5.3% of the EPA limit 4000 µg/L worst single sample: 240 µg/L	19/19	SYR4	2012–2018
Barium	130 µg/L 6.5% of the EPA limit 2000 µg/L	14/19	SYR4	2012–2018
Monochloroacetic Acid	4.88 µg/L No EPA limit set worst single sample: 5.3 µg/L	4/234	SYR4	2012–2019

94 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: DE LA CRUZ, JOE
Phone: 408-730-7561
Email: [email protected]

Frequently asked questions about City of Sunnyvale

Is City of Sunnyvale tap water safe to drink?

EPA monitoring detected 15 contaminants in City of Sunnyvale'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 City of Sunnyvale's water?

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

How many people does City of Sunnyvale serve?

City of Sunnyvale reports serving 157,566 people in California, per its EPA record.

Has City of Sunnyvale had any water quality violations?

The EPA has 141 violations on file for City of Sunnyvale, of which 10 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.