Serving roughly 13,000 people in San Bernardino County, California.
Data current as of July 2026
🔍Straight from EPA
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Results for MUSCOY MWC NO. 1
1 water provider directly on file, serving roughly 13,000 people in San Bernardino County, California.
Quick answer: MUSCOY MWC NO. 1 has no violations on file and no single reading stands out against its peers (669 other providers in this area). It serves roughly 13,000 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
TTHM
Chloroform
Bromodichloromethane
Dibromochloromethane
Nitrate
Adsorbableorganicfluorine
Perfluorohexanesulfonicacid (PFHxS)
Utility MUSCOY MWC NO. 1Population served 13,000Owner Private
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2023
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 5.3 UG/L (ppb)
8/14/2025
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: 1.3 UG/L (ppb)
8/14/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 2 UG/L (ppb)
8/14/2025
Dibromochloromethane
Detected: 2 UG/L (ppb)
8/14/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 3.7 MG/L (ppm)
8/18/2025
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
Adsorbableorganicfluorine
Detected: 1400 NG/L (ppt)
5/21/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 4.5 NG/L (ppt)
5/21/2025
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.