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Tap water quality report

Riverdale Public Utility District

EPA monitoring tested this supplier for 71 contaminants and detected 4. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

71
contaminants tested
4
detected
2,756
people served
103
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Local government
Counties served
Fresno

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.

103
health-based violations
125
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2014-04-01 → 2014-06-30
MCL Health-based Resolved 2014-04-01 → 2014-06-30
MCL Health-based Resolved 2014-04-01 → 2014-06-30
MCL Health-based Resolved 2014-01-01 → 2014-03-31
MCL Health-based Resolved 2014-01-01 → 2014-03-31
MCL Health-based Resolved 2014-01-01 → 2014-03-31
MCL Health-based Resolved 2013-10-01 → 2013-12-31
MCL Health-based Resolved 2013-10-01 → 2013-12-31
MCL Health-based Resolved 2013-10-01 → 2013-12-31
MCL Health-based Resolved 2013-09-01 → 2013-09-30

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 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
40.08 µg/L 401%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 41.9 µg/L
33/33 SYR4 2012–2018
Lead
0.0057 mg/L 38%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2024
Fluoride
2365 µg/L 59%
of the EPA limit 4000 µg/L
worst single sample: 2500 µg/L
10/10 SYR4 2012–2018
Selenium
5.8 µg/L 12%
of the EPA limit 50 µg/L
 1/6 SYR4 2012–2018
67 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, TotalAsbestosAtrazineBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChloroformChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEthylbenzeneGlyphosateLassoLeadMercuryMonobromoacetic AcidMonochloroacetic AcidNitrateNitrate-NitriteNitriteOxamylPentachlorophenolPicloramSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
ROMERO, VINCENT
Phone
559-867-3838
Email
vromero@riverdalepud.com

Frequently asked questions about Riverdale Public Utility District

Is Riverdale Public Utility District tap water safe to drink?

EPA monitoring detected 4 contaminants in Riverdale Public Utility District'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 Riverdale Public Utility District's water?

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

How many people does Riverdale Public Utility District serve?

Riverdale Public Utility District reports serving 2,756 people in California, per its EPA record.

Has Riverdale Public Utility District had any water quality violations?

The EPA has 125 violations on file for Riverdale Public Utility District, of which 103 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.