Serving roughly 8,700 people in Los Angeles County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for TRACT 349 MUTUAL WATER CO.
1 water provider directly on file, serving roughly 8,700 people in Los Angeles County, California.
Quick answer: TRACT 349 MUTUAL WATER CO. has no violations on file. One reading is worth knowing about: Barium was measured at 170UG/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
PFHXS
PFOS
PFOA
PFBA
TTHM
Bromoform
Dibromochloromethane
Aggressive Index
Magnesium
Calcium
Potassium
Sodium
Hardness, Total (ASCACO3)
Nitrogen-Ammoniaas (N)
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Chloride
Sulfate
Nitrate
Nitrate-Nitrite
Perfluorohexanesulfonicacid (PFHxS)
Perfluoroctanesulfonicacid (PFOS)
Perfluoroctanoicacid (PFOA)
Perfluorohexanoicacid (PFHXA)
Perfluorobutanoicacid (PFBA)
Perfluoropentanoicacid (PFPEA)
Turbidity
pH
Odor
Manganese
1, 4-Dioxane
Chromium, Hex
Barium
Arsenic
Conductivity (at 25°C)
Utility TRACT 349 MUTUAL WATER CO.Population served 8,700Owner Private
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
Manganese
Detected: 37 UG/L (ppb)
10/8/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Chromium, Hex
Detected: 0.7 UG/L (ppb)
4/30/2025
Barium
Detected: 170 UG/L (ppb)
8/22/2025
Arsenic
Detected: 2.2 UG/L (ppb)
8/22/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 3 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.
Bromoform
Detected: 1.9 UG/L (ppb)
8/6/2025
Dibromochloromethane
Detected: 1.1 UG/L (ppb)
8/6/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 59 MG/L (ppm)
8/22/2025
Sulfate
Detected: 110 MG/L (ppm)
8/22/2025
Nitrate
Detected: 0.56 MG/L (ppm)
8/22/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Nitrate-Nitrite
Detected: 0.56 MG/L (ppm)
8/22/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 11.7 MG/L (ppm)
8/22/2025
Calcium
Detected: 59.9 MG/L (ppm)
8/22/2025
Potassium
Detected: 2.8 MG/L (ppm)
8/22/2025
Sodium
Detected: 49 MG/L (ppm)
8/22/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 198 MG/L (ppm)
8/22/2025
pH
Detected: 6.37 PH
8/22/2025
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
PFHXS
Detected: 0.0066 µg/L (ppb)
9/12/2023
PFOS
Detected: 0.0365 µg/L (ppb)
9/12/2023
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFOA
Detected: 0.0082 µg/L (ppb)
9/12/2023
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFBA
Detected: 0.0053 µg/L (ppb)
9/12/2023
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 240 MG/L (ppm)
8/22/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 10.8 AGGR
8/22/2025
Nitrogen-Ammoniaas (N)
Detected: 0.17 MG/L (ppm)
7/23/2025
Alkalinity, Total
Detected: 190 MG/L (ppm)
8/22/2025
TDS
Detected: 390 MG/L (ppm)
8/22/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 6.8 NG/L (ppt)
9/8/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 42 NG/L (ppt)
9/8/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 11 NG/L (ppt)
9/8/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorohexanoicacid (PFHXA)
Detected: 2.1 NG/L (ppt)
9/8/2025
Perfluorobutanoicacid (PFBA)
Detected: 4.7 NG/L (ppt)
9/8/2025
Perfluoropentanoicacid (PFPEA)
Detected: 2 NG/L (ppt)
9/8/2025
Turbidity
Detected: 0.11 NTU
9/17/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 1 TON
9/17/2025
1, 4-Dioxane
Detected: 3.7 UG/L (ppb)
8/8/2025
Conductivity (at 25°C)
Detected: 620 UMHO/CM
8/22/2025
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.