Is Riverkern Mutual Water Company Tap Water Safe? Quality Report

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

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	2002-03-01 → 2002-03-31
MCL	Health-based	Resolved	2002-03-01 → 2002-03-31
MCL	Health-based	Resolved	1996-05-01 → 1996-05-31
MCL	Health-based	Resolved	1996-05-01 → 1996-05-31
MCL	Health-based	Resolved	1994-03-01 → 1994-03-31
MCL	Health-based	Resolved	1994-03-01 → 1994-03-31
MCL	Health-based	Resolved	1993-11-01 → 1993-11-30
MCL	Health-based	Resolved	1993-11-01 → 1993-11-30
MR	Monitoring	Resolved	2004-12-01 → 2004-12-31
MR	Monitoring	Resolved	2004-12-01 → 2004-12-31

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
Nitrate	2983 µg/L 30% of the EPA limit 10000 µg/L worst single sample: 3069 µg/L	26/34	SYR4	2012–2019
Lead	0.0026 mg/L 17% of the EPA limit 0.0150 mg/L	24/24	LCR	2023
Fluoride	405 µg/L 10% of the EPA limit 4000 µg/L worst single sample: 420 µg/L	6/6	SYR4	2012–2019
Bromodichloromethane	2.9515 µg/L No EPA limit set worst single sample: 3.19 µg/L	4/4	SYR4	2014–2019
Chloroform	5.1555 µg/L No EPA limit set worst single sample: 5.7 µg/L	4/4	SYR4	2014–2019
Dibromochloromethane	2.4265 µg/L No EPA limit set worst single sample: 2.56 µg/L	4/4	SYR4	2014–2019
TTHM	11.0815 µg/L 14% of the EPA limit 80 µg/L worst single sample: 12.19 µg/L	4/4	SYR4	2014–2019
Dichloroacetic Acid	1.58 µg/L No EPA limit set worst single sample: 1.6 µg/L	3/4	SYR4	2014–2019
Bromoform	0.7330 µg/L No EPA limit set worst single sample: 0.7400 µg/L	2/4	SYR4	2014–2019
Combined Uranium	4.81404 µg/L 16% of the EPA limit 30 µg/L worst single sample: 4.81568 µg/L	2/2	SYR4	2015–2016
Dibromoacetic Acid	1.285 µg/L No EPA limit set worst single sample: 1.3 µg/L	2/4	SYR4	2014–2019
Antimony, Total	0.0310 µg/L 0.5% of the EPA limit 6 µg/L	1/7	SYR4	2012–2019
Arsenic	1.749 µg/L 17% of the EPA limit 10 µg/L	1/7	SYR4	2012–2019
Barium	14.265 µg/L 0.7% of the EPA limit 2000 µg/L	1/7	SYR4	2012–2019
Beryllium, Total	0.0050 µg/L 0.1% of the EPA limit 4 µg/L	1/7	SYR4	2012–2019
Copper	3.566 µg/L 0.3% of the EPA limit 1300 µg/L	1/29	SYR4	2012–2019
Lead	0.3030 µg/L 2% of the EPA limit 15 µg/L	1/27	SYR4	2012–2019
Nitrate-Nitrite	2200 µg/L 22% of the EPA limit 10000 µg/L	1/2	SYR4	2018–2019
Selenium	0.1440 µg/L 0.3% of the EPA limit 50 µg/L	1/7	SYR4	2012–2019
Toluene	0.9500 µg/L 0.1% of the EPA limit 1000 µg/L	1/3	SYR4	2016–2017
Total Haloacetic Acids (HAA5)	3.9 µg/L 6.5% of the EPA limit 60 µg/L	1/4	SYR4	2014–2019
Trichloroacetic Acid	1.2 µg/L No EPA limit set	1/4	SYR4	2014–2019

34 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-DichloropropaneAsbestosAtrazineBenzeneChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneEthylene DibromideEthylbenzeneLassoMercuryMonobromoacetic AcidMonochloroacetic AcidNitriteSimazineStyreneTetrachloroethyleneThallium, TotalTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: JOSIF, TOBIN
Phone: 818-970-6022
Email: tjosif@me.com

Frequently asked questions about Riverkern Mutual Water Company

Is Riverkern Mutual Water Company tap water safe to drink?

EPA monitoring detected 22 contaminants in Riverkern Mutual Water Company'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 Riverkern Mutual Water Company's water?

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

How many people does Riverkern Mutual Water Company serve?

Riverkern Mutual Water Company reports serving 272 people in California, per its EPA record.

Has Riverkern Mutual Water Company had any water quality violations?

The EPA has 20 violations on file for Riverkern Mutual Water Company, of which 8 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.