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Tap water quality report

Viejas Community

EPA monitoring tested this supplier for 101 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

101
contaminants tested
15
detected
9,600
people served
3
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Native American

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.

3
health-based violations
145
violations on file
1
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2008-12-01 → 2008-12-31
MCL Health-based Resolved 2002-12-01 → 2002-12-31
MCL Health-based Resolved 1996-07-01 → 1996-07-31
RPT Monitoring Unaddressed 2026-02-01
RPT Monitoring Resolved 2025-12-01
MR Monitoring Resolved 2007-05-01 → 2007-05-31
MR Monitoring Resolved 2007-01-01 → 2007-12-31
MR Monitoring Resolved 2007-01-01 → 2007-12-31
MR Monitoring Resolved 2005-01-01 → 2007-12-31
MR Monitoring Resolved 2005-01-01 → 2007-12-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0243 µg/L 2/4 2024

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
Nitrate
7020 µg/L 70%
of the EPA limit 10000 µg/L
 92/108 SYR4 2012–2019
TTHM
35 µg/L 44%
of the EPA limit 80 µg/L
 16/16 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
5.4 µg/L 9%
of the EPA limit 60 µg/L
 15/16 SYR4 2012–2019
Fluoride
320 µg/L 8%
of the EPA limit 4000 µg/L
 9/9 SYR4 2012–2018
Lead
0.00080 mg/L 5.3%
of the EPA limit 0.0150 mg/L
 9/9 LCR 2025
Combined Uranium
23.393 µg/L 78%
of the EPA limit 30 µg/L
 8/9 SYR4 2012–2016
Barium
61 µg/L 3.1%
of the EPA limit 2000 µg/L
 7/9 SYR4 2012–2018
Gross Alpha, Excl. Radon And U
6 pCi/L 40%
of the EPA limit 15 pCi/L
 7/8 SYR4 2012–2016
Arsenic
6 µg/L 60%
of the EPA limit 10 µg/L
 5/10 SYR4 2012–2018
Lithium
21.4 µg/L
No EPA limit set
 4/4 UCMR-5 2024
Combined Radium (-226 And -228)
1.25 pCi/L 25%
of the EPA limit 5 pCi/L
 2/8 SYR4 2012–2018
Dichloromethane
2.3 µg/L 46%
of the EPA limit 5 µg/L
 1/14 SYR4 2012–2018
Selenium
2.14 µg/L 4.3%
of the EPA limit 50 µg/L
 1/9 SYR4 2012–2018
Toluene
18 µg/L 1.8%
of the EPA limit 1000 µg/L
 1/14 SYR4 2012–2018
86 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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
John Christman
Phone
6195715569
Email
jchristman@viejas-nsn.gov

Frequently asked questions about Viejas Community

Is Viejas Community tap water safe to drink?

EPA monitoring detected 15 contaminants in Viejas Community'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 Viejas Community's water?

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

How many people does Viejas Community serve?

Viejas Community reports serving 9,600 people in California, per its EPA record.

Has Viejas Community had any water quality violations?

The EPA has 145 violations on file for Viejas Community, of which 3 are health-based (a contaminant limit or required treatment was breached) and 1 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.