SOUTH MONTEBELLO IRRIGATION DIST. Water Quality Report
Serving roughly 15,021 people in Los Angeles County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for SOUTH MONTEBELLO IRRIGATION DIST.
1 water provider directly on file, serving roughly 15,021 people in Los Angeles County, California.
Quick answer: SOUTH MONTEBELLO IRRIGATION DIST. has no violations on file. One reading is worth knowing about: Copper, Free was measured at 830UG/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
Pfda
PFOA
PFOS
PFBS
PFHXA
PFPEA
Lithium
TTHM
Lead
Dibromochloromethane
Chloroform
Bromodichloromethane
Copper, Free
Carbon, Total
Perfluorobutanesulfonicacid (PFBS)
Perfluoroheptanoicacid (PFHPA)
Perfluorohexanesulfonicacid (PFHxS)
Perfluorononanoicacid (PFNA)
Perfluoroctanesulfonicacid (PFOS)
Perfluoroctanoicacid (PFOA)
Perfluorodecanoicacid (PFDA)
Perfluorohexanoicacid (PFHXA)
Perfluorobutanoicacid (PFBA)
Perfluoropentanoicacid (PFPEA)
Arsenic
Utility SOUTH MONTEBELLO IRRIGATION DIST.Population served 15,021Owner Local government
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)
12/31/2025
Lead
Detected: 15 UG/L (ppb)
9/30/2025
A metal that can leach from old pipes, solder, and fixtures. Current medical guidance holds there is no truly safe level of lead exposure, especially for children and pregnant women.
Copper, Free
Detected: 830 UG/L (ppb)
9/30/2025
Arsenic
Detected: 2 UG/L (ppb)
10/7/2025
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: 1.1 UG/L (ppb)
7/2/2025
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.
Dibromochloromethane
Detected: 1.1 UG/L (ppb)
7/2/2025
Chloroform
Detected: 1.1 UG/L (ppb)
7/2/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 1.4 UG/L (ppb)
7/2/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Pfda
Detected: 0.0037 µg/L (ppb)
5/31/2024
PFOA
Detected: 0.0082 µg/L (ppb)
11/12/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFOS
Detected: 0.0201 µg/L (ppb)
11/12/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFBS
Detected: 0.0034 µg/L (ppb)
11/12/2024
PFHXA
Detected: 0.0066 µg/L (ppb)
11/12/2024
PFPEA
Detected: 0.0067 µg/L (ppb)
11/12/2024
Lithium
Detected: 9.45 µg/L (ppb)
11/12/2024
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
Carbon, Total
Detected: 0.58 MG/L (ppm)
9/16/2025
Perfluorobutanesulfonicacid (PFBS)
Detected: 5.3 NG/L (ppt)
9/16/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 3 NG/L (ppt)
9/16/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 2.4 NG/L (ppt)
9/16/2025
Perfluorononanoicacid (PFNA)
Detected: 3 NG/L (ppt)
9/16/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 28 NG/L (ppt)
9/16/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 10 NG/L (ppt)
9/16/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorodecanoicacid (PFDA)
Detected: 2.8 NG/L (ppt)
9/16/2025
Perfluorohexanoicacid (PFHXA)
Detected: 6.4 NG/L (ppt)
9/16/2025
Perfluorobutanoicacid (PFBA)
Detected: 5.4 NG/L (ppt)
9/16/2025
Perfluoropentanoicacid (PFPEA)
Detected: 7.2 NG/L (ppt)
9/16/2025
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.