RIO DELL 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 RIO DELL, CA
1 water provider on file serving this city.
Quick answer: RIO DELL'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 3,300 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Copper Summary
Nitrate
Carbon, Total
Chromium, Hex
Chloroform
Bromodichloromethane
Dibromochloromethane
TTHM
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Totalhaloaceticacids (HAA5)
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2023
Copper Summary
Detected: 3.4 mg/L (ppm)
12/31/1993
Chromium, Hex
Detected: 0.3 UG/L (ppb)
9/11/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Chloroform
Detected: 19 UG/L (ppb)
8/25/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 8.9 UG/L (ppb)
8/25/2025
Dibromochloromethane
Detected: 4 UG/L (ppb)
8/25/2025
TTHM
Detected: 31 UG/L (ppb)
8/25/2025
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: 10 UG/L (ppb)
8/25/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 0.22 MG/L (ppm)
8/25/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Other
Additional substances tested that don't fit neatly into the categories above
Carbon, Total
Detected: 0.72 MG/L (ppm)
8/26/2025
Dichloroaceticacid
Detected: 6.1 UG/L (ppb)
8/25/2025
Trichloroaceticacid
Detected: 3 UG/L (ppb)
8/25/2025
Dibromoaceticacid
Detected: 1.1 UG/L (ppb)
8/25/2025
Filtration considerations: General system types, not a specific product recommendation.