OAKDALE is served by 1 water provider on file with the EPA.
Data current as of July 2026
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Results for OAKDALE, CA
1 water provider on file serving this city.
Quick answer: OAKDALE's water currently has an open health-based violation on file: Lead And Copper Rule Revisions, a compliance issue since 10/17/2024. This is active, not historical — see the violation detail below for what EPA's enforcement record shows.
Lead Summary
TTHM
Dibromochloromethane
Nitrate
Gross Alpha Particle Activity
Chromium, Hex
Chloroform
Copper, Free
Violations on file
Lead And Copper Rule Revisions
Currently open health violation
Found at 1 of 1 provider
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2025
Chromium, Hex
Detected: 3.2 UG/L (ppb)
3/18/2025
Copper, Free
Detected: 150 UG/L (ppb)
9/9/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 1.16 UG/L (ppb)
1/13/2025
A group of disinfection byproducts formed when chlorine reacts with organic matter. Long-term exposure above the legal limit has been linked to increased cancer risk in some studies.
Dibromochloromethane
Detected: 1.16 UG/L (ppb)
1/13/2025
Chloroform
Detected: 1.04 UG/L (ppb)
1/13/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 1.7 MG/L (ppm)
7/7/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Gross Alpha Particle Activity
Detected: 3.16 PCI/L
7/7/2025
Filtration considerations: General system types, not a specific product recommendation.