ROSEVILLE is served by 2 water providers on file with the EPA.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
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Results for ROSEVILLE, CA
2 water providers on file serving this city.
Quick answer: ROSEVILLE's water has no violations on file and no single reading stands out against its peers (2 other providers in this area). It serves roughly 155,612 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Lithium
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromodichloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromochloromethane
Carbon, Total
Fluoride
Nitrate
Chromium, Hex
Alkalinity, Total
Alkalinity, Bicarbonate
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2024
Chromium, Hex
Detected: 4.3 UG/L (ppb)
6/2/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 19 UG/L (ppb)
8/26/2025
TTHM
Detected: 26 UG/L (ppb)
8/26/2025
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: 24 UG/L (ppb)
8/26/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 1.4 UG/L (ppb)
8/26/2025
Dibromochloromethane
Detected: 0.8 UG/L (ppb)
8/26/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Fluoride
Detected: 0.65 MG/L (ppm)
10/1/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 0.9 MG/L (ppm)
5/6/2025
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: 61.4 µg/L (ppb)
2/15/2024
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 21 MG/L (ppm)
10/1/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 8.5 UG/L (ppb)
8/26/2025
Trichloroaceticacid
Detected: 11 UG/L (ppb)
8/26/2025
Carbon, Total
Detected: 0.82 MG/L (ppm)
10/1/2025
Alkalinity, Total
Detected: 21 MG/L (ppm)
10/1/2025
Filtration considerations: General system types, not a specific product recommendation.