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Tap water quality report

Uc - Davis

EPA monitoring tested this supplier for 105 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

105
contaminants tested
11
detected
49,616
people served
3
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
State government
Counties served
Yolo

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
5
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2010-01-01 → 2010-01-31
MCL Health-based Resolved 2002-08-01 → 2002-10-31
MCL Health-based Resolved 1992-09-01 → 1992-09-30
MR Monitoring Resolved 2022-10-01
MR Monitoring Resolved 2022-10-01

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 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
10396 µg/L 104%
of the EPA limit, in the worst sample — 10000 µg/L
 94/166 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 23/23 LCR 2023
Arsenic
6.2 µg/L 62%
of the EPA limit 10 µg/L
 10/16 SYR4 2014–2017
Fluoride
140 µg/L 3.5%
of the EPA limit 4000 µg/L
 10/12 SYR4 2014–2017
Lithium
30 µg/L
No EPA limit set
 9/15 UCMR-5 2024
Chromium
14 µg/L 14%
of the EPA limit 100 µg/L
 4/12 SYR4 2014–2017
Combined Uranium
4.768 µg/L 16%
of the EPA limit 30 µg/L
 2/7 SYR4 2012–2018
Selenium
9.9 µg/L 20%
of the EPA limit 50 µg/L
 2/12 SYR4 2014–2017
Barium
130 µg/L 6.5%
of the EPA limit 2000 µg/L
 1/12 SYR4 2014–2017
Nitrate-Nitrite
1400 µg/L 14%
of the EPA limit 10000 µg/L
 1/6 SYR4 2017
Picloram
1.1 µg/L 0.2%
of the EPA limit 500 µg/L
 1/23 SYR4 2013–2018
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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MOREJOHN, JOSHUA
Phone
530-754-5591
Email
jdmorejohn@ucdavis.edu

Frequently asked questions about Uc - Davis

Is Uc - Davis tap water safe to drink?

EPA monitoring detected 11 contaminants in Uc - Davis'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 Uc - Davis's water?

EPA monitoring detected Nitrate, Lead, Arsenic, Fluoride, Lithium, and others. The full list with the level and data source for each is above.

How many people does Uc - Davis serve?

Uc - Davis reports serving 49,616 people in California, per its EPA record.

Has Uc - Davis had any water quality violations?

The EPA has 5 violations on file for Uc - Davis, of which 3 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.