Serving roughly 139,461 people in Orange County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for CITY OF FULLERTON
1 water provider directly on file, serving roughly 139,461 people in Orange County, California.
Quick answer: CITY OF FULLERTON has no violations on file. One reading is worth knowing about: PFHXA was measured at 0.0112µg/L, among the highest of the 167 providers on file in this area. It's the most notable figure in this system's record among its 167 local peers.
Lead Summary
PFOS
PFBA
PFHXA
PFBS
PFHPA
PFHXS
PFPEA
PFOA
Lithium
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Alkalinity, Total
Carbon, Total
TDS
Chloride
Sulfate
Nitrate-Nitrite
Nitrate
Perfluorohexanoicacid (PFHXA)
Perfluorobutanoicacid (PFBA)
Perfluoropentanoicacid (PFPEA)
Perfluoroheptanoicacid (PFHPA)
Perfluoroctanoicacid (PFOA)
Perfluorobutanesulfonicacid (PFBS)
Utility CITY OF FULLERTONPopulation served 139,461Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.0015 mg/L (ppm)
12/31/2024
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 12 UG/L (ppb)
8/6/2025
TTHM
Detected: 30 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: 6 UG/L (ppb)
8/6/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 3.9 UG/L (ppb)
8/6/2025
Bromodichloromethane
Detected: 8.6 UG/L (ppb)
8/6/2025
Dibromochloromethane
Detected: 12 UG/L (ppb)
8/6/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 72.3 MG/L (ppm)
10/9/2025
Sulfate
Detected: 125 MG/L (ppm)
10/9/2025
Nitrate-Nitrite
Detected: 1.29 MG/L (ppm)
4/10/2025
Nitrate
Detected: 1.21 MG/L (ppm)
10/9/2025
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
PFOS
Detected: 0.0119 µg/L (ppb)
2/25/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFBA
Detected: 0.0059 µg/L (ppb)
2/25/2025
PFHXA
Detected: 0.0112 µg/L (ppb)
2/25/2025
PFBS
Detected: 0.0076 µg/L (ppb)
2/25/2025
PFHPA
Detected: 0.0048 µg/L (ppb)
2/25/2025
PFHXS
Detected: 0.0052 µg/L (ppb)
2/25/2025
PFPEA
Detected: 0.0132 µg/L (ppb)
2/25/2025
PFOA
Detected: 0.0102 µg/L (ppb)
2/25/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Lithium
Detected: 28.1434 µg/L (ppb)
10/20/2025
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
Dichloroaceticacid
Detected: 2.1 UG/L (ppb)
8/6/2025
Trichloroaceticacid
Detected: 1.2 UG/L (ppb)
8/6/2025
Dibromoaceticacid
Detected: 3.6 UG/L (ppb)
8/6/2025
Alkalinity, Total
Detected: 123 MG/L (ppm)
10/9/2025
Carbon, Total
Detected: 0.12 MG/L (ppm)
10/9/2025
TDS
Detected: 444 MG/L (ppm)
10/9/2025
Perfluorohexanoicacid (PFHXA)
Detected: 6.9 NG/L (ppt)
9/11/2025
Perfluorobutanoicacid (PFBA)
Detected: 4.8 NG/L (ppt)
9/11/2025
Perfluoropentanoicacid (PFPEA)
Detected: 7.8 NG/L (ppt)
9/8/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 2.2 NG/L (ppt)
5/15/2025
Perfluoroctanoicacid (PFOA)
Detected: 3.3 NG/L (ppt)
9/11/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorobutanesulfonicacid (PFBS)
Detected: 4.5 NG/L (ppt)
9/11/2025
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.