Serving roughly 26,554 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 MONTEBELLO LAND & WATER CO.
1 water provider directly on file, serving roughly 26,554 people in Los Angeles County, California.
Quick answer: MONTEBELLO LAND & WATER CO. has no violations on file. One reading is worth knowing about: PFOS was measured at 0.053µg/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
PFOS
PFHXS
PFBS
PFBA
PFHPA
PFOA
PFHXA
PFPEA
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dibromoaceticacid
Aggressive Index
Langelier Index (pH(s))
Langelier Index (Source Temp.)
Magnesium
Potassium
Sodium
Hardness, Total (ASCACO3)
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Chloride
Sulfate
Fluoride
Nitrate
Perfluorobutanesulfonicacid (PFBS)
Perfluoroheptanoicacid (PFHPA)
Perfluorohexanesulfonicacid (PFHxS)
Perfluorononanoicacid (PFNA)
Perfluoroctanesulfonicacid (PFOS)
Perfluoroctanoicacid (PFOA)
Perfluorodecanoicacid (PFDA)
Perfluorohexanoicacid (PFHXA)
Perfluorobutanoicacid (PFBA)
Perfluoropentanoicacid (PFPEA)
Utility MONTEBELLO LAND & WATER CO.Population served 26,554Owner 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)
12/31/2026
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 21 UG/L (ppb)
7/15/2025
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: 1.2 UG/L (ppb)
7/15/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 8.1 UG/L (ppb)
7/15/2025
Bromodichloromethane
Detected: 3.5 UG/L (ppb)
7/15/2025
Dibromochloromethane
Detected: 7.9 UG/L (ppb)
7/15/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 57 MG/L (ppm)
2/10/2025
Sulfate
Detected: 99 MG/L (ppm)
2/10/2025
Fluoride
Detected: 0.21 MG/L (ppm)
2/10/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 2.2 MG/L (ppm)
5/19/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 12.4 MG/L (ppm)
2/10/2025
Potassium
Detected: 4.3 MG/L (ppm)
2/10/2025
Sodium
Detected: 54 MG/L (ppm)
2/10/2025
Calcium
Detected: 70.8 MG/L (ppm)
2/10/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 0.353 LANG
2/10/2025
Hardness, Total (ASCACO3)
Detected: 228 MG/L (ppm)
2/10/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFOS
Detected: 0.053 µg/L (ppb)
10/9/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFHXS
Detected: 0.006 µg/L (ppb)
10/9/2024
PFBS
Detected: 0.009 µg/L (ppb)
10/9/2024
PFBA
Detected: 0.011 µg/L (ppb)
10/9/2024
PFHPA
Detected: 0.0049 µg/L (ppb)
10/9/2024
PFOA
Detected: 0.015 µg/L (ppb)
10/9/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFHXA
Detected: 0.0091 µg/L (ppb)
10/9/2024
PFPEA
Detected: 0.0092 µg/L (ppb)
10/9/2024
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 250 MG/L (ppm)
2/10/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dibromoaceticacid
Detected: 2.3 UG/L (ppb)
7/15/2025
Aggressive Index
Detected: 11.7 AGGR
2/10/2025
Langelier Index (Source Temp.)
Detected: -0.197 LANG
2/10/2025
Alkalinity, Total
Detected: 200 MG/L (ppm)
2/10/2025
TDS
Detected: 440 MG/L (ppm)
2/10/2025
Perfluorobutanesulfonicacid (PFBS)
Detected: 8.6 NG/L (ppt)
9/19/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 4 NG/L (ppt)
9/19/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 5.5 NG/L (ppt)
9/19/2025
Perfluorononanoicacid (PFNA)
Detected: 4 NG/L (ppt)
9/19/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 61 NG/L (ppt)
9/19/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 17 NG/L (ppt)
9/19/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorodecanoicacid (PFDA)
Detected: 2.5 NG/L (ppt)
9/19/2025
Perfluorohexanoicacid (PFHXA)
Detected: 5.8 NG/L (ppt)
9/19/2025
Perfluorobutanoicacid (PFBA)
Detected: 12 NG/L (ppt)
9/3/2025
Perfluoropentanoicacid (PFPEA)
Detected: 11 NG/L (ppt)
9/3/2025
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.