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Tap water quality report

City of Davis

EPA monitoring tested this supplier for 106 contaminants and detected 14. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

106
contaminants tested
14
detected
67,457
people served
61
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Local 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.

61
health-based violations
61
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2005-03-01 → 2005-04-30
MCL Health-based Resolved 2005-03-01 → 2005-04-30
MCL Health-based Resolved 1996-01-01 → 1996-01-31
MCL Health-based Resolved 1996-01-01 → 1996-01-31
MCL Health-based Resolved 1990-01-01 → 1994-12-31
MCL Health-based Archived 1989-12-01 → 1989-12-31
MCL Health-based Archived 1989-11-01 → 1989-11-30
MCL Health-based Archived 1989-10-01 → 1989-10-31
MCL Health-based Archived 1989-09-01 → 1989-09-30
MCL Health-based Archived 1989-08-01 → 1989-08-31

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
Nitrate
9800 µg/L 98%
of the EPA limit 10000 µg/L
 598/672 SYR4 2012–2019
Chromium
53 µg/L 53%
of the EPA limit 100 µg/L
 204/259 SYR4 2012–2019
Arsenic
8.4 µg/L 84%
of the EPA limit 10 µg/L
 141/180 SYR4 2012–2019
Fluoride
410 µg/L 10%
of the EPA limit 4000 µg/L
 110/126 SYR4 2012–2019
Selenium
45 µg/L 90%
of the EPA limit 50 µg/L
 100/161 SYR4 2012–2019
Barium
230 µg/L 12%
of the EPA limit 2000 µg/L
 71/127 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 40/40 LCR 2026
Combined Uranium
9.5658 µg/L 32%
of the EPA limit 30 µg/L
 29/42 SYR4 2012–2019
Gross Beta Particle Activity
15.58 pCi/L
No EPA limit set
 14/16 SYR4 2017–2019
Nitrate-Nitrite
6100 µg/L 61%
of the EPA limit 10000 µg/L
 14/34 SYR4 2017–2019
Lithium
37.3 µg/L
No EPA limit set
 9/18 UCMR-5 2024
Copper
400 µg/L 31%
of the EPA limit 1300 µg/L
 8/127 SYR4 2012–2019
Lead
11 µg/L 73%
of the EPA limit 15 µg/L
 6/132 SYR4 2012–2019
TTHM
0.6300 µg/L 0.8%
of the EPA limit 80 µg/L
 1/8 SYR4 2012–2019
92 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, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
GRYCZKO, STAN
Phone
530-757-5686
Email
sgryczko@cityofdavis.org

Frequently asked questions about City of Davis

Is City of Davis tap water safe to drink?

EPA monitoring detected 14 contaminants in City of 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 City of Davis's water?

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

How many people does City of Davis serve?

City of Davis reports serving 67,457 people in California, per its EPA record.

Has City of Davis had any water quality violations?

The EPA has 61 violations on file for City of Davis, of which 61 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.