Serving roughly 214,665 people in San Bernardino County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for SAN BERNARDINO CITY
1 water provider directly on file, serving roughly 214,665 people in San Bernardino County, California.
Quick answer: SAN BERNARDINO CITY has no violations on file and no single reading stands out against its peers (669 other providers in this area). It serves roughly 214,665 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Lithium
PFBS
PFHXS
PFHXA
PFPEA
Magnesium
Sodium
Calcium
Sulfate
Chloride
Hardness, Total (ASCACO3)
TDS
Nitrate
Utility SAN BERNARDINO CITYPopulation served 214,665Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2024
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Sulfate
Detected: 37 MG/L (ppm)
8/12/2025
Chloride
Detected: 28 MG/L (ppm)
8/12/2025
Nitrate
Detected: 4.9 MG/L (ppm)
10/8/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 8.6 MG/L (ppm)
8/12/2025
Sodium
Detected: 34 MG/L (ppm)
8/12/2025
Calcium
Detected: 53 MG/L (ppm)
8/12/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 170 MG/L (ppm)
8/12/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 9.11 µg/L (ppb)
4/18/2024
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
PFBS
Detected: 0.0044 µg/L (ppb)
10/17/2024
PFHXS
Detected: 0.004 µg/L (ppb)
10/17/2024
PFHXA
Detected: 0.004 µg/L (ppb)
10/17/2024
PFPEA
Detected: 0.0034 µg/L (ppb)
10/17/2024
Other
Additional substances tested that don't fit neatly into the categories above
TDS
Detected: 280 MG/L (ppm)
8/12/2025
Filtration considerations: See the table below for how whole-house carbon, under-sink reverse osmosis, and under-sink carbon systems compare against what's actually on file here. These are general system types, not a specific product recommendation.