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Tap water quality report

San Antonio Water Company

EPA monitoring tested this supplier for 111 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

111
contaminants tested
13
detected
3,441
people served
5
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Private
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.

5
health-based violations
7
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2015-11-01 → 2015-11-30
MCL Health-based Resolved 2004-02-01 → 2004-02-29
MCL Health-based Resolved 2004-02-01 → 2004-02-29
MCL Health-based Resolved 1993-02-01 → 1993-02-28
MCL Health-based Resolved 1993-02-01 → 1993-02-28
MR Monitoring Resolved 1993-07-01 → 2000-03-01
MR Monitoring Resolved 1993-07-01 → 2000-03-01

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
12204 µg/L 122%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 18000 µg/L
618/632 SYR4 2012–2019
1,2-DIBROMO-3-CHLOROPROPANE
0.2640 µg/L 132%
of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L
worst single sample: 0.4100 µg/L
173/275 SYR4 2012–2019
Fluoride
590 µg/L 15%
of the EPA limit 4000 µg/L
worst single sample: 990 µg/L
33/33 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 29/29 LCR 2025
Combined Uranium
9.4764 µg/L 32%
of the EPA limit 30 µg/L
worst single sample: 10.728 µg/L
13/14 SYR4 2012–2013
Nitrate-Nitrite
579500 µg/L 5795%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 750000 µg/L
12/15 SYR4 2012–2019
Chloroform
5.04 µg/L
No EPA limit set
worst single sample: 5.2 µg/L
9/22 SYR4 2013–2019
TTHM
6.7 µg/L 8.4%
of the EPA limit 80 µg/L
worst single sample: 7.1 µg/L
9/22 SYR4 2013–2019
Bromodichloromethane
1.87 µg/L
No EPA limit set
worst single sample: 1.9 µg/L
4/22 SYR4 2013–2019
Dichloroacetic Acid
1.37 µg/L
No EPA limit set
worst single sample: 1.4 µg/L
4/17 SYR4 2014–2019
Total Haloacetic Acids (HAA5)
1.37 µg/L 2.3%
of the EPA limit 60 µg/L
worst single sample: 1.4 µg/L
4/17 SYR4 2014–2019
Arsenic
4.94 µg/L 49%
of the EPA limit 10 µg/L
worst single sample: 5.1 µg/L
3/33 SYR4 2012–2019
Dibromochloromethane
1 µg/L
No EPA limit set
 1/22 SYR4 2013–2019
98 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-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
LEE, BRIAN
Phone
909-982-4107
Email
[email protected]

Frequently asked questions about San Antonio Water Company

Is San Antonio Water Company tap water safe to drink?

EPA monitoring detected 13 contaminants in San Antonio Water Company'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 San Antonio Water Company's water?

EPA monitoring detected Nitrate, 1,2-DIBROMO-3-CHLOROPROPANE, Fluoride, Lead, Combined Uranium, and others. The full list with the level and data source for each is above.

How many people does San Antonio Water Company serve?

San Antonio Water Company reports serving 3,441 people in California, per its EPA record.

Has San Antonio Water Company had any water quality violations?

The EPA has 7 violations on file for San Antonio Water Company, of which 5 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.