Serving roughly 132,171 people in El Dorado County, California.
Data current as of July 2026
🔍Straight from EPA
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Results for EL DORADO ID - MAIN
1 water provider directly on file, serving roughly 132,171 people in El Dorado County, California.
Quick answer: EL DORADO ID - MAIN has no violations on file. One reading is worth knowing about: Totalhaloaceticacids (HAA5) was measured at 39UG/L, among the highest of the 303 providers on file in this area. It's the most notable figure in this system's record among its 303 local peers.
Lead Summary
PFPEA
pH, Field
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromodichloromethane
Dichloroaceticacid
Trichloroaceticacid
Monochloroaceticacid
Odor
Nitrate-Nitrite
Nitrate
Aluminum
Utility EL DORADO ID - MAINPopulation served 132,171Owner 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)
12/31/2023
Aluminum
Detected: 80 UG/L (ppb)
5/6/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 39 UG/L (ppb)
8/12/2025
TTHM
Detected: 33 UG/L (ppb)
8/12/2025
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: 31 UG/L (ppb)
8/12/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 2 UG/L (ppb)
8/12/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate-Nitrite
Detected: 0.3 MG/L (ppm)
5/6/2025
Nitrate
Detected: 0.3 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.
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
pH, Field
Detected: 7.32 PH
8/12/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFPEA
Detected: 0.0032 µg/L (ppb)
2/7/2023
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 13 UG/L (ppb)
8/12/2025
Trichloroaceticacid
Detected: 21 UG/L (ppb)
8/12/2025
Monochloroaceticacid
Detected: 4.2 UG/L (ppb)
8/12/2025
Odor
Detected: 2.5 TON
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.