Serving roughly 7,784 people in Merced County, California.
Data current as of July 2026
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Results for DELHI CWD
1 water provider directly on file, serving roughly 7,784 people in Merced County, California.
Quick answer: DELHI CWD has no violation currently counted toward its compliance status. EPA's record shows a Nitrate violation dating to 04/01/1984 (42 years ago) — because it's more than five years past its deadline, EPA's policy no longer treats it as part of this system's current standing, though it remains on the public record.
Lead Summary
PFHXS
PFOS
Lead
Nitrate
Perfluorobutanesulfonicacid (PFBS)
Perfluorohexanesulfonicacid (PFHxS)
Perfluoroctanesulfonicacid (PFOS)
Perfluoropentanesulfonicacid (PFPES)
Perfluorohexanoicacid (PFHXA)
Gross Alpha Particle Activity
1, 2, 3-Trichloropropane
Arsenic
Utility DELHI CWDPopulation served 7,784Owner Local government
Older violation on record
Violations on file
Nitrate
Older/archived health-based violation
Found at 1 of 1 provider
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
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: 13.2 UG/L (ppb)
9/16/2025
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.
Arsenic
Detected: 9.78 UG/L (ppb)
8/26/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 8.82 MG/L (ppm)
9/16/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Gross Alpha Particle Activity
Detected: 5.37 PCI/L
5/13/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFHXS
Detected: 0.008 µg/L (ppb)
5/5/2025
PFOS
Detected: 0.0073 µg/L (ppb)
5/5/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
1, 2, 3-Trichloropropane
Detected: 0.0024 UG/L (ppb)
8/28/2025
Other
Additional substances tested that don't fit neatly into the categories above
Perfluorobutanesulfonicacid (PFBS)
Detected: 2.7 NG/L (ppt)
7/17/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 8.9 NG/L (ppt)
7/17/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 8.8 NG/L (ppt)
7/17/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoropentanesulfonicacid (PFPES)
Detected: 2.7 NG/L (ppt)
7/17/2025
Perfluorohexanoicacid (PFHXA)
Detected: 2.1 NG/L (ppt)
1/22/2025
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.