GUSTINE is served by 1 water provider on file with the EPA.
Data current as of July 2026
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Results for GUSTINE, CA
1 water provider on file serving this city.
Quick answer: GUSTINE'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
Lithium
TTHM
Bromoform
Dibromochloromethane
Dibromoaceticacid
Copper, Free
Nitrate
Radium-228
Combined Uranium
Gross Beta Particle Activity
Chromium, Hex
Chromium
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
Copper, Free
Detected: 99 UG/L (ppb)
9/24/2025
Combined Uranium
Detected: 3.32 PCI/L
8/27/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Chromium, Hex
Detected: 10 UG/L (ppb)
9/17/2025
Chromium
Detected: 10 UG/L (ppb)
3/20/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 7.6 UG/L (ppb)
6/11/2025
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.
Bromoform
Detected: 6.2 UG/L (ppb)
6/11/2025
Dibromochloromethane
Detected: 1.4 UG/L (ppb)
6/11/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 5.9 MG/L (ppm)
8/13/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 21 µg/L (ppb)
10/9/2023
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
Other
Additional substances tested that don't fit neatly into the categories above
Dibromoaceticacid
Detected: 1.3 UG/L (ppb)
6/11/2025
Radium-228
Detected: 0.796 PCI/L
8/27/2025
Gross Beta Particle Activity
Detected: 2.9 PCI/L
8/27/2025
Filtration considerations: General system types, not a specific product recommendation.