Serving roughly 24,937 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 SEAL BEACH
1 water provider directly on file, serving roughly 24,937 people in Orange County, California.
Quick answer: CITY OF SEAL BEACH has no violations on file. One reading is worth knowing about: Chloroform was measured at 18.8UG/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
Lithium
Odor
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dibromoaceticacid
Dichloroaceticacid
Trichloroaceticacid
Magnesium
Potassium
Sodium
Calcium
Hardness, Total (ASCACO3)
Bromide
Alkalinity, Bicarbonate
Alkalinity, Total
Carbon, Total
TDS
Sulfate
Chloride
Fluoride
Gross Alpha Particle Activity
pH
Iron
Manganese
Barium
Arsenic
Copper, Free
Zinc
Conductivity (at 25°C)
Utility CITY OF SEAL BEACHPopulation served 24,937Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2024
Iron
Detected: 29.4 UG/L (ppb)
1/15/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 7.2 UG/L (ppb)
1/15/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Barium
Detected: 24 UG/L (ppb)
1/15/2025
Arsenic
Detected: 2 UG/L (ppb)
1/15/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Copper, Free
Detected: 1.1 UG/L (ppb)
1/15/2025
Zinc
Detected: 5.6 UG/L (ppb)
1/15/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 13.3 UG/L (ppb)
8/11/2025
TTHM
Detected: 34.3 UG/L (ppb)
8/11/2025
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: 18.8 UG/L (ppb)
8/11/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 1.48 UG/L (ppb)
8/11/2025
Bromodichloromethane
Detected: 10 UG/L (ppb)
8/11/2025
Dibromochloromethane
Detected: 5.39 UG/L (ppb)
8/11/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Sulfate
Detected: 53.8 MG/L (ppm)
7/14/2025
Chloride
Detected: 30.3 MG/L (ppm)
7/14/2025
Fluoride
Detected: 0.44 MG/L (ppm)
1/15/2025
Often added deliberately for dental health; can also occur naturally.
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 2.7 MG/L (ppm)
7/14/2025
Potassium
Detected: 1.7 MG/L (ppm)
7/14/2025
Sodium
Detected: 67.1 MG/L (ppm)
7/14/2025
Calcium
Detected: 27.4 MG/L (ppm)
7/14/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 76.5 MG/L (ppm)
1/15/2025
Gross Alpha Particle Activity
Detected: 1.15 PCI/L
1/15/2025
pH
Detected: 8.2 PH
7/14/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 31.3661 µg/L (ppb)
12/6/2023
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
Bromide
Detected: 0.07 MG/L (ppm)
7/14/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 149 MG/L (ppm)
1/15/2025
Other
Additional substances tested that don't fit neatly into the categories above
Odor
Detected: 1 TON
7/14/2025
Dibromoaceticacid
Detected: 1.03 UG/L (ppb)
8/11/2025
Dichloroaceticacid
Detected: 7.15 UG/L (ppb)
8/11/2025
Trichloroaceticacid
Detected: 5.09 UG/L (ppb)
8/11/2025
Alkalinity, Total
Detected: 120 MG/L (ppm)
7/14/2025
Carbon, Total
Detected: 0.43 MG/L (ppm)
7/14/2025
TDS
Detected: 254 MG/L (ppm)
7/14/2025
Conductivity (at 25°C)
Detected: 437 UMHO/CM
7/14/2025
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.