THOUSAND OAKS is served by 1 water provider on file with the EPA.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
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Results for THOUSAND OAKS, CA
1 water provider on file serving this city.
Quick answer: THOUSAND OAKS's water has no violations on file and no single reading stands out against its peers (1 other providers in this area). It serves roughly 53,157 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Copper Summary
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Dibromoaceticacid
Copper, Free
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 Summary
Detected: 287 mg/L (ppm)
12/31/1998
Copper, Free
Detected: 150 UG/L (ppb)
8/27/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 14 UG/L (ppb)
9/16/2025
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.
Chloroform
Detected: 1.6 UG/L (ppb)
9/16/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 4.4 UG/L (ppb)
9/16/2025
Bromodichloromethane
Detected: 2.8 UG/L (ppb)
9/16/2025
Dibromochloromethane
Detected: 5.3 UG/L (ppb)
9/16/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 1.5 UG/L (ppb)
9/16/2025
Dibromoaceticacid
Detected: 2.1 UG/L (ppb)
9/16/2025
Filtration considerations: General system types, not a specific product recommendation.