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Tap water quality report

City of Modesto - Del Rio

EPA monitoring tested this supplier for 82 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

82
contaminants tested
8
detected
1,327
people served
4
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Local government
Counties served
Stanislaus

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.

4
health-based violations
7
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2011-07-01 → 2011-09-30
MCL Health-based Resolved 2011-07-01 → 2011-09-30
MCL Health-based Resolved 2006-01-01 → 2006-01-31
MCL Health-based Resolved 2006-01-01 → 2006-01-31
MR Monitoring Resolved 2001-04-01 → 2001-04-30
MR Monitoring Resolved 1998-08-01 → 1998-08-31
MR Monitoring Resolved 1993-07-01 → 2003-12-31

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 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
9410 µg/L 94%
of the EPA limit 10000 µg/L
 160/202 SYR4 2012–2019
Nitrate-Nitrite
9410 µg/L 94%
of the EPA limit 10000 µg/L
 31/32 SYR4 2012–2018
1,2-DIBROMO-3-CHLOROPROPANE
0.5500 µg/L 275%
of the EPA limit, in the worst sample — 0.2000 µg/L
 18/21 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2025
Arsenic
6.6 µg/L 66%
of the EPA limit 10 µg/L
 10/10 SYR4 2012–2018
Fluoride
130 µg/L 3.3%
of the EPA limit 4000 µg/L
 3/10 SYR4 2012–2018
Combined Uranium
0.1743 µg/L 0.6%
of the EPA limit 30 µg/L
 1/11 SYR4 2013–2019
Di(2-ethylhexyl) Phthalate
0.2000 µg/L 3.3%
of the EPA limit 6 µg/L
 1/2 SYR4 2018
74 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromateBromodichloromethaneBromoformChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloriteChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MARTINEZ, MANUEL
Phone
209-342-4592
Email
mmartinez@modestogov.com

Frequently asked questions about City of Modesto - Del Rio

Is City of Modesto - Del Rio tap water safe to drink?

EPA monitoring detected 8 contaminants in City of Modesto - Del Rio'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 City of Modesto - Del Rio's water?

EPA monitoring detected Nitrate, Nitrate-Nitrite, 1,2-DIBROMO-3-CHLOROPROPANE, Lead, Arsenic, and others. The full list with the level and data source for each is above.

How many people does City of Modesto - Del Rio serve?

City of Modesto - Del Rio reports serving 1,327 people in California, per its EPA record.

Has City of Modesto - Del Rio had any water quality violations?

The EPA has 7 violations on file for City of Modesto - Del Rio, of which 4 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.