Serving roughly 20,256 people in Los Angeles County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for LOMITA-CITY, WATER DEPT.
1 water provider directly on file, serving roughly 20,256 people in Los Angeles County, California.
Quick answer: LOMITA-CITY, WATER DEPT. has no violations on file. One reading is worth knowing about: Alkalinity, Bicarbonate was measured at 440MG/L, among the highest of the 601 providers on file in this area. It's the most notable figure in this system's record among its 601 local peers.
Lead Summary
Lithium
PFHXS
PFOS
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Aggressive Index
Langelier Index (pH(s))
Langelier Index (Source Temp.)
Magnesium
Potassium
Calcium
Sodium
Hardness, Total (ASCACO3)
Alkalinity, Total
Alkalinity, Bicarbonate
Foamingagents (SURFACTANTS)
TDS
Sulfate
Chloride
Fluoride
Turbidity
pH
Odor
Boron, Total
Iron
Manganese
Conductivity (at 25°C)
Color
Utility LOMITA-CITY, WATER DEPT.Population served 20,256Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2023
Iron
Detected: 340 UG/L (ppb)
2/18/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 110 UG/L (ppb)
2/18/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 6.5 UG/L (ppb)
8/12/2025
TTHM
Detected: 23.4 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: 4.7 UG/L (ppb)
8/12/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 3.5 UG/L (ppb)
8/12/2025
Bromodichloromethane
Detected: 6.6 UG/L (ppb)
8/12/2025
Dibromochloromethane
Detected: 8.6 UG/L (ppb)
8/12/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Sulfate
Detected: 5 MG/L (ppm)
2/18/2025
Chloride
Detected: 200 MG/L (ppm)
2/18/2025
Fluoride
Detected: 0.32 MG/L (ppm)
2/18/2025
Often added deliberately for dental health; can also occur naturally.
Boron, Total
Detected: 320 UG/L (ppb)
2/18/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 22 MG/L (ppm)
2/18/2025
Potassium
Detected: 6.7 MG/L (ppm)
2/18/2025
Calcium
Detected: 83 MG/L (ppm)
2/18/2025
Sodium
Detected: 150 MG/L (ppm)
2/18/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 1.36 LANG
2/18/2025
Hardness, Total (ASCACO3)
Detected: 300 MG/L (ppm)
2/18/2025
pH
Detected: 7.7 PH
2/18/2025
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: 41.1 µg/L (ppb)
7/1/2025
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
PFHXS
Detected: 0.0041 µg/L (ppb)
7/1/2025
PFOS
Detected: 0.0043 µg/L (ppb)
7/1/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 440 MG/L (ppm)
2/18/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 3.9 UG/L (ppb)
8/12/2025
Trichloroaceticacid
Detected: 1.1 UG/L (ppb)
8/12/2025
Dibromoaceticacid
Detected: 1.5 UG/L (ppb)
8/12/2025
Aggressive Index
Detected: 12.62 AGGR
2/18/2025
Langelier Index (Source Temp.)
Detected: 0.75 LANG
2/18/2025
Alkalinity, Total
Detected: 360 MG/L (ppm)
2/18/2025
Foamingagents (SURFACTANTS)
Detected: 0.19 MG/L (ppm)
2/18/2025
TDS
Detected: 700 MG/L (ppm)
2/18/2025
Turbidity
Detected: 2.4 NTU
2/18/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 1 TON
2/18/2025
Conductivity (at 25°C)
Detected: 1300 UMHO/CM
2/18/2025
Color
Detected: 15 UNITS
2/18/2025
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.