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Tap water quality report

City of San Bruno

EPA monitoring tested this supplier for 110 contaminants and detected 17. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

110
contaminants tested
17
detected
42,631
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Local government
Counties served
San Mateo

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.

0
health-based violations
2
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2010-01-01 → 2010-12-31
MR Monitoring Resolved 2010-01-01 → 2010-12-31

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Dichloroacetic Acid
23.4 µg/L
No EPA limit set
 131/136 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
50.6 µg/L 84%
of the EPA limit 60 µg/L
 129/136 SYR4 2012–2019
TTHM
60 µg/L 75%
of the EPA limit 80 µg/L
 120/120 SYR4 2012–2019
Bromodichloromethane
8.9 µg/L
No EPA limit set
 116/120 SYR4 2012–2019
Chloroform
58.5 µg/L
No EPA limit set
 116/120 SYR4 2012–2019
Dibromochloromethane
4.94 µg/L
No EPA limit set
 102/120 SYR4 2012–2019
Trichloroacetic Acid
24.9 µg/L
No EPA limit set
 100/136 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 46/46 LCR 2025
Nitrate
1700 µg/L 17%
of the EPA limit 10000 µg/L
 42/82 SYR4 2012–2019
Monochloroacetic Acid
4 µg/L
No EPA limit set
 32/136 SYR4 2012–2019
Bromoform
3.1 µg/L
No EPA limit set
 19/120 SYR4 2012–2019
Dibromoacetic Acid
2.2 µg/L
No EPA limit set
 19/136 SYR4 2012–2019
Lithium
40 µg/L
No EPA limit set
 8/12 UCMR-5 2025
Fluoride
160 µg/L 4%
of the EPA limit 4000 µg/L
 7/12 SYR4 2012–2019
Chromium
20 µg/L 20%
of the EPA limit 100 µg/L
 1/13 SYR4 2012–2019
Nitrate-Nitrite
1500 µg/L 15%
of the EPA limit 10000 µg/L
 1/3 SYR4 2017
Toluene
0.7800 µg/L 0.1%
of the EPA limit 1000 µg/L
 1/13 SYR4 2012–2019
93 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-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
LEE, MATTHEW
Phone
650-616-7075
Email
mlee@sanbruno.ca.gov

Frequently asked questions about City of San Bruno

Is City of San Bruno tap water safe to drink?

EPA monitoring detected 17 contaminants in City of San Bruno'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 San Bruno's water?

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

How many people does City of San Bruno serve?

City of San Bruno reports serving 42,631 people in California, per its EPA record.

Has City of San Bruno had any water quality violations?

The EPA has 2 violations on file for City of San Bruno, 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.