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Tap water quality report

Riverside Csd

EPA monitoring tested this supplier for 37 contaminants and detected 6. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

37
contaminants tested
6
detected
333
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Local government
Counties served
Humboldt

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.

0
health-based violations
20
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2019-10-01
MR Monitoring Resolved 2019-10-01
MR Monitoring Resolved 2018-10-01
MR Monitoring Resolved 2018-10-01
MR Monitoring Resolved 2018-10-01
MR Monitoring Resolved 2009-05-01 → 2009-06-30
MR Monitoring Resolved 2009-05-01 → 2009-06-30
MR Monitoring Resolved 2005-01-01 → 2005-03-31
MR Monitoring Resolved 2005-01-01 → 2005-03-31
MR Monitoring Resolved 2004-09-01 → 2004-09-30

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
1107.4 µg/L 11%
of the EPA limit 10000 µg/L
 26/26 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
Fluoride
350 µg/L 8.8%
of the EPA limit 4000 µg/L
 3/3 SYR4 2015–2018
Nitrate-Nitrite
1000000 µg/L 10000%
of the EPA limit, in the worst sample — 10000 µg/L
 3/3 SYR4 2014–2018
Barium
420 µg/L 21%
of the EPA limit 2000 µg/L
 2/2 SYR4 2015
Thallium, Total
1 µg/L 50%
of the EPA limit 2 µg/L
 1/2 SYR4 2015
31 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalArsenicBenzeneBeryllium, TotalChlorobenzeneCopperCadmiumCarbon TetrachlorideChromiumDichloromethaneEthylbenzeneLeadMercuryNitriteSeleniumStyreneTetrachloroethyleneTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
RAYL, WILLIAM (BILLY)
Phone
707-845-8221
Email
raylbilly@gmail.com

Frequently asked questions about Riverside Csd

Is Riverside Csd tap water safe to drink?

EPA monitoring detected 6 contaminants in Riverside Csd'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 Riverside Csd's water?

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

How many people does Riverside Csd serve?

Riverside Csd reports serving 333 people in California, per its EPA record.

Has Riverside Csd had any water quality violations?

The EPA has 20 violations on file for Riverside Csd, of which 0 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.