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Tap water quality report

Sonoma State University

EPA monitoring tested this supplier for 104 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

104
contaminants tested
13
detected
10,986
people served
12
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
State government
Counties served
Sonoma

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.

12
health-based violations
22
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2017-05-01 → 2017-05-31
TT Health-based Resolved 2017-05-01 → 2017-05-31
MCL Health-based Resolved 2004-10-01 → 2004-10-31
MCL Health-based Resolved 2004-10-01 → 2004-10-31
MCL Health-based Resolved 2002-05-01 → 2002-05-31
MCL Health-based Resolved 2002-05-01 → 2002-05-31
MCL Health-based Resolved 2000-09-01 → 2000-09-30
MCL Health-based Resolved 2000-09-01 → 2000-09-30
MCL Health-based Resolved 1999-11-01 → 1999-11-30
MCL Health-based Resolved 1999-11-01 → 1999-11-30

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
6600 µg/L 66%
of the EPA limit 10000 µg/L
 170/170 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 37/37 LCR 2024
Bromoform
4.06 µg/L
No EPA limit set
 12/17 SYR4 2013–2019
Dibromochloromethane
5.15 µg/L
No EPA limit set
 12/17 SYR4 2013–2019
TTHM
15.7 µg/L 20%
of the EPA limit 80 µg/L
 12/17 SYR4 2013–2019
Arsenic
3.6 µg/L 36%
of the EPA limit 10 µg/L
 7/9 SYR4 2012–2017
Bromodichloromethane
3.95 µg/L
No EPA limit set
 7/17 SYR4 2013–2019
Chloroform
2.54 µg/L
No EPA limit set
 5/17 SYR4 2013–2019
Dibromoacetic Acid
1.5 µg/L
No EPA limit set
 4/17 SYR4 2013–2019
Fluoride
210 µg/L 5.3%
of the EPA limit 4000 µg/L
 4/7 SYR4 2012–2017
Total Haloacetic Acids (HAA5)
1.5 µg/L 2.5%
of the EPA limit 60 µg/L
 4/17 SYR4 2013–2019
Lithium
11 µg/L
No EPA limit set
 2/2 UCMR-5 2024
Xylenes, Total
3.3 µg/L 0%
of the EPA limit 10000 µg/L
 1/8 SYR4 2012–2019
91 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBariumBenzeneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BRUNETTA, MISSY
Phone
707-664-3408
Email
brunetta@sonoma.edu

Frequently asked questions about Sonoma State University

Is Sonoma State University tap water safe to drink?

EPA monitoring detected 13 contaminants in Sonoma State University'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 Sonoma State University's water?

EPA monitoring detected Nitrate, Lead, Bromoform, Dibromochloromethane, TTHM, and others. The full list with the level and data source for each is above.

How many people does Sonoma State University serve?

Sonoma State University reports serving 10,986 people in California, per its EPA record.

Has Sonoma State University had any water quality violations?

The EPA has 22 violations on file for Sonoma State University, of which 12 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.