Is Cal-Water Service Co.-Marysville Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Private
Counties served: Yuba

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	1993-01-01 → 1993-01-31
MCL	Health-based	Resolved	1993-01-01 → 1993-01-31

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 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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Arsenic	6.95895 µg/L 70% of the EPA limit 10 µg/L worst single sample: 8.704 µg/L	540/548	SYR4	2012–2019
Nitrate	2644.85 µg/L 26% of the EPA limit 10000 µg/L worst single sample: 3064 µg/L	158/174	SYR4	2012–2019
Combined Uranium	6.16219 µg/L 21% of the EPA limit 30 µg/L worst single sample: 6.50683 µg/L	119/145	SYR4	2013–2019
TTHM	7.22 µg/L 9% of the EPA limit 80 µg/L worst single sample: 10 µg/L	89/176	SYR4	2013–2019
Tetrachloroethylene	2.3255 µg/L 47% of the EPA limit 5 µg/L worst single sample: 5.4 µg/L	88/284	SYR4	2012–2019
Copper	12.372 µg/L 1% of the EPA limit 1300 µg/L worst single sample: 54.558 µg/L	76/360	SYR4	2012–2019
Lead	1.007 µg/L 6.7% of the EPA limit 15 µg/L worst single sample: 23.543 µg/L	76/166	SYR4	2012–2019
Antimony, Total	0.1440 µg/L 2.4% of the EPA limit 6 µg/L worst single sample: 0.1650 µg/L	71/159	SYR4	2012–2019
Dibromochloromethane	2.948 µg/L No EPA limit set worst single sample: 4.28 µg/L	69/176	SYR4	2013–2019
Chromium	11.1746 µg/L 11% of the EPA limit 100 µg/L worst single sample: 12.547 µg/L	67/153	SYR4	2012–2019
Selenium	2.09525 µg/L 4.2% of the EPA limit 50 µg/L worst single sample: 2.525 µg/L	56/128	SYR4	2012–2019
Bromodichloromethane	1.78 µg/L No EPA limit set worst single sample: 2.6 µg/L	51/175	SYR4	2013–2019
Barium	110.682 µg/L 5.5% of the EPA limit 2000 µg/L worst single sample: 150 µg/L	47/120	SYR4	2012–2019
Bromoform	3.158 µg/L No EPA limit set worst single sample: 3.77 µg/L	45/175	SYR4	2013–2019
Cadmium	0.1529 µg/L 3.1% of the EPA limit 5 µg/L worst single sample: 0.1570 µg/L	30/165	SYR4	2012–2019
Chloroform	1.395 µg/L No EPA limit set worst single sample: 2.8 µg/L	26/176	SYR4	2013–2019
Dibromoacetic Acid	2.65 µg/L No EPA limit set worst single sample: 4.5 µg/L	26/93	SYR4	2013–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	23/23	LCR	2025
Beryllium, Total	0.0122 µg/L 0.3% of the EPA limit 4 µg/L worst single sample: 0.0140 µg/L	13/115	SYR4	2012–2019
Thallium, Total	0.0185 µg/L 0.9% of the EPA limit 2 µg/L worst single sample: 0.0190 µg/L	12/153	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	33 µg/L 55% of the EPA limit 60 µg/L worst single sample: 34 µg/L	11/93	SYR4	2013–2019
Nitrate-Nitrite	1100 µg/L 11% of the EPA limit 10000 µg/L	6/7	SYR4	2016–2019
Dichloroacetic Acid	16.85 µg/L No EPA limit set worst single sample: 17 µg/L	4/93	SYR4	2013–2019
Trichloroacetic Acid	16.85 µg/L No EPA limit set worst single sample: 17 µg/L	4/93	SYR4	2013–2019
Fluoride	129.5 µg/L 3.2% of the EPA limit 4000 µg/L worst single sample: 130 µg/L	2/22	SYR4	2012–2019
Mercury	0.0067 µg/L 0.3% of the EPA limit 2 µg/L worst single sample: 0.0070 µg/L	2/25	SYR4	2012–2019
cis-1,2-Dichloroethylene	0.5000 µg/L 0.7% of the EPA limit 70 µg/L	1/284	SYR4	2012–2019

59 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAtrazineBenzeneChlorobenzeneCyanideCarbon TetrachlorideDichloromethaneEthylene DibromideEthylbenzeneGlyphosateHfpo-DaLassoMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaSimazineStyreneTolueneTrichloroethyleneVinyl ChlorideXylenes, TotalLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: JAMES, SOPHIE
Phone: 408-367-8593
Email: sjames@calwater.com

Frequently asked questions about Cal-Water Service Co.-Marysville

Is Cal-Water Service Co.-Marysville tap water safe to drink?

EPA monitoring detected 27 contaminants in Cal-Water Service Co.-Marysville'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-Water Service Co.-Marysville's water?

EPA monitoring detected Arsenic, Nitrate, Combined Uranium, TTHM, Tetrachloroethylene, and others. The full list with the level and data source for each is above.

How many people does Cal-Water Service Co.-Marysville serve?

Cal-Water Service Co.-Marysville reports serving 12,419 people in California, per its EPA record.

Has Cal-Water Service Co.-Marysville had any water quality violations?

The EPA has 2 violations on file for Cal-Water Service Co.-Marysville, of which 2 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.