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Tap water quality report

Cal Am - Walnut Grove

EPA monitoring tested this supplier for 70 contaminants and detected 4. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

70
contaminants tested
4
detected
667
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Private
Counties served
Sacramento

Compliance record

No violations on file. The EPA has no formal drinking-water violations recorded for this supplier.

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
Arsenic
10 µg/L 100%
of the EPA limit 10 µg/L
worst single sample: 21 µg/L
792/856 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 21/21 LCR 2025
Fluoride
257.5 µg/L 6.4%
of the EPA limit 4000 µg/L
worst single sample: 260 µg/L
6/9 SYR4 2012–2018
Styrene
0.7000 µg/L 0.7%
of the EPA limit 100 µg/L
 1/6 SYR4 2012–2018
66 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNitrateNitrate-NitriteNitriteOxamylPentachlorophenolPicloramSeleniumSimazineTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
FOSTER, AUDIE
Phone
916-568-4259
Email
audie.foster@amwater.com

Frequently asked questions about Cal Am - Walnut Grove

Is Cal Am - Walnut Grove tap water safe to drink?

EPA monitoring detected 4 contaminants in Cal Am - Walnut Grove'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 Cal Am - Walnut Grove's water?

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

How many people does Cal Am - Walnut Grove serve?

Cal Am - Walnut Grove reports serving 667 people in California, per its EPA record.

Has Cal Am - Walnut Grove had any water quality violations?

The EPA has no formal drinking-water violations on file for Cal Am - Walnut Grove.

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.