Serving roughly 5,500 people in Los Angeles County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for MAYWOOD MUTUAL WATER CO. #1
1 water provider directly on file, serving roughly 5,500 people in Los Angeles County, California.
Quick answer: MAYWOOD MUTUAL WATER CO. #1 has no violations on file and no single reading stands out against its peers (601 other providers in this area). It serves roughly 5,500 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
PFOS
Lithium
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Turbidity
Odor
Nitrate
Perfluoroctanesulfonicacid (PFOS)
Perfluorohexanesulfonicacid (PFHxS)
Perfluoroctanoicacid (PFOA)
Perfluorobutanoicacid (PFBA)
Iron
Manganese
1, 4-Dioxane
Chromium, Hex
Utility MAYWOOD MUTUAL WATER CO. #1Population served 5,500Owner 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)
12/31/2024
Iron
Detected: 190 UG/L (ppb)
7/14/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 60 UG/L (ppb)
9/15/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Chromium, Hex
Detected: 0.3 UG/L (ppb)
7/14/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 8 UG/L (ppb)
10/6/2025
TTHM
Detected: 30.3 UG/L (ppb)
10/6/2025
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: 7.2 UG/L (ppb)
10/6/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 3.4 UG/L (ppb)
10/6/2025
Bromodichloromethane
Detected: 9.3 UG/L (ppb)
10/6/2025
Dibromochloromethane
Detected: 10.4 UG/L (ppb)
10/6/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 0.82 MG/L (ppm)
4/14/2025
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: 0.0106 µg/L (ppb)
8/7/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Lithium
Detected: 11.2 µg/L (ppb)
8/7/2024
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: 4.1 UG/L (ppb)
10/6/2025
Trichloroaceticacid
Detected: 2.7 UG/L (ppb)
10/6/2025
Dibromoaceticacid
Detected: 1.2 UG/L (ppb)
10/6/2025
Turbidity
Detected: 0.21 NTU
2/3/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 1 TON
4/7/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 5.4 NG/L (ppt)
7/14/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorohexanesulfonicacid (PFHxS)
Detected: 1.9 NG/L (ppt)
4/14/2025
Perfluoroctanoicacid (PFOA)
Detected: 3.1 NG/L (ppt)
4/14/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorobutanoicacid (PFBA)
Detected: 3 NG/L (ppt)
4/14/2025
1, 4-Dioxane
Detected: 2.2 UG/L (ppb)
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.