Serving roughly 17,711 people in Kern County, California.
Data current as of July 2026
🔍Straight from EPA
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Results for ROSAMOND CSD
1 water provider directly on file, serving roughly 17,711 people in Kern County, California.
Quick answer: ROSAMOND CSD has no violations on file. One reading is worth knowing about: Lithium was measured at 40.4µg/L, among the highest of the 682 providers on file in this area. It's the most notable figure in this system's record among its 682 local peers.
Lead Summary
Copper Summary
Lithium
TTHM
Bromoform
Dibromochloromethane
Arsenic
Nitrate
Chromium, Hex
Utility ROSAMOND CSDPopulation served 17,711Owner Local government
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)
12/31/2024
Copper Summary
Detected: 1.38 mg/L (ppm)
12/31/1995
Arsenic
Detected: 8.4 UG/L (ppb)
10/14/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Chromium, Hex
Detected: 14 UG/L (ppb)
9/9/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 2.6 UG/L (ppb)
6/10/2025
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.
Bromoform
Detected: 1.3 UG/L (ppb)
6/10/2025
Dibromochloromethane
Detected: 1.3 UG/L (ppb)
6/10/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 1.5 MG/L (ppm)
7/15/2025
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: 40.4 µg/L (ppb)
12/3/2024
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
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.