MONTAGUE is served by 1 water provider on file with the EPA.
Data current as of July 2026
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Results for MONTAGUE, CA
1 water provider on file serving this city.
Quick answer: MONTAGUE'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
Totalhaloaceticacids (HAA5)
Lead
Chloroform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Copper, Free
Alkalinity, Total
Alkalinity, Bicarbonate
Alkalinity, Carbonate
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: 0.00156 mg/L (ppm)
12/31/2025
Lead
Detected: 1 UG/L (ppb)
9/4/2025
A metal that can leach from old pipes, solder, and fixtures. Current medical guidance holds there is no truly safe level of lead exposure, especially for children and pregnant women.
Copper, Free
Detected: 31.3 UG/L (ppb)
9/4/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 120 UG/L (ppb)
8/7/2025
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.
Totalhaloaceticacids (HAA5)
Detected: 52 UG/L (ppb)
4/3/2025
Chloroform
Detected: 100 UG/L (ppb)
8/7/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 6.6 UG/L (ppb)
8/7/2025
Dibromochloromethane
Detected: 1.4 UG/L (ppb)
5/1/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 178 MG/L (ppm)
10/2/2025
Alkalinity, Carbonate
Detected: 11 MG/L (ppm)
10/2/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 17 UG/L (ppb)
4/3/2025
Trichloroaceticacid
Detected: 35 UG/L (ppb)
4/3/2025
Alkalinity, Total
Detected: 189 MG/L (ppm)
10/2/2025
Filtration considerations: General system types, not a specific product recommendation.