Serving roughly 37,931 people in Los Angeles County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
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Results for MONROVIA-CITY, WATER DEPT.
1 water provider directly on file, serving roughly 37,931 people in Los Angeles County, California.
Quick answer: MONROVIA-CITY, WATER DEPT. has no violations on file. One reading is worth knowing about: PFHXA was measured at 0.014µg/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
PFHXA
PFOS
PFPEA
PFBA
PFOA
PFHXS
Temperature (CENTIGRADE)
Nitrate
Perfluoroctanesulfonicacid (PFOS)
Perfluoroctanoicacid (PFOA)
Perfluorohexanoicacid (PFHXA)
Perfluorobutanoicacid (PFBA)
Perfluoropentanoicacid (PFPEA)
Perfluorobutanesulfonicacid (PFBS)
Perfluoroheptanoicacid (PFHPA)
Perfluorohexanesulfonicacid (PFHxS)
Turbidity
Odor
Perchlorate
Utility MONROVIA-CITY, WATER DEPT.Population served 37,931Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2024
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 1.5 MG/L (ppm)
10/28/2025
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
PFHXA
Detected: 0.014 µg/L (ppb)
4/8/2025
PFOS
Detected: 0.0061 µg/L (ppb)
4/8/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFPEA
Detected: 0.0097 µg/L (ppb)
4/8/2025
PFBA
Detected: 0.0052 µg/L (ppb)
4/8/2025
PFOA
Detected: 0.0054 µg/L (ppb)
4/8/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFHXS
Detected: 0.0035 µg/L (ppb)
4/8/2025
Other
Additional substances tested that don't fit neatly into the categories above
Temperature (CENTIGRADE)
Detected: 18.7 C
10/28/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 4.3 NG/L (ppt)
10/15/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 4.2 NG/L (ppt)
10/15/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorohexanoicacid (PFHXA)
Detected: 6.9 NG/L (ppt)
10/15/2025
Perfluorobutanoicacid (PFBA)
Detected: 3.3 NG/L (ppt)
10/15/2025
Perfluoropentanoicacid (PFPEA)
Detected: 4.8 NG/L (ppt)
10/15/2025
Perfluorobutanesulfonicacid (PFBS)
Detected: 2.1 NG/L (ppt)
10/15/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 2.1 NG/L (ppt)
9/2/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 2 NG/L (ppt)
10/15/2025
Turbidity
Detected: 0.1 NTU
10/7/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 1 TON
10/7/2025
Perchlorate
Detected: 0.53 UG/L (ppb)
4/1/2025
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
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.