Serving roughly 137,044 people in San Diego County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for ESCONDIDO, CITY OF
1 water provider directly on file, serving roughly 137,044 people in San Diego County, California.
Quick answer: ESCONDIDO, CITY OF has no violations on file. One reading is worth knowing about: Chlorate was measured at 440UG/L, among the highest of the 414 providers on file in this area. It's the most notable figure in this system's record among its 414 local peers.
Lead Summary
Lithium
Fluoride
Chlorite
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Chlorate
Utility ESCONDIDO, CITY OFPopulation served 137,044Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.0011 mg/L (ppm)
12/31/2024
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 14 UG/L (ppb)
8/6/2025
TTHM
Detected: 37 UG/L (ppb)
8/6/2025
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: 11 UG/L (ppb)
8/6/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 2.2 UG/L (ppb)
8/6/2025
Bromodichloromethane
Detected: 13 UG/L (ppb)
8/6/2025
Dibromochloromethane
Detected: 10 UG/L (ppb)
8/6/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Fluoride
Detected: 0.63 MG/L (ppm)
10/7/2025
Often added deliberately for dental health; can also occur naturally.
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 16 µg/L (ppb)
11/8/2023
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
Other
Additional substances tested that don't fit neatly into the categories above
Chlorite
Detected: 0.39 MG/L (ppm)
10/7/2025
Dichloroaceticacid
Detected: 6 UG/L (ppb)
8/6/2025
Trichloroaceticacid
Detected: 5.2 UG/L (ppb)
8/6/2025
Dibromoaceticacid
Detected: 2.4 UG/L (ppb)
8/6/2025
Chlorate
Detected: 440 UG/L (ppb)
10/7/2025
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.