TWENTYNINE PALMS WATER DISTRICT Water Quality Report
Serving roughly 18,795 people in San Bernardino County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
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Results for TWENTYNINE PALMS WATER DISTRICT
1 water provider directly on file, serving roughly 18,795 people in San Bernardino County, California.
Quick answer: TWENTYNINE PALMS WATER DISTRICT has no violation currently counted toward its compliance status. EPA's record shows a Fluoride violation dating to 02/01/1988 (38 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
Lithium
TTHM
Bromoform
Dibromochloromethane
Fluoride
pH
Arsenic
Aggressive Index
Langelier Index (pH(s))
Langelier Index (Source Temp.)
Magnesium
Potassium
Sodium
Calcium
Hardness, Total (ASCACO3)
Alkalinity, Total
Alkalinity, Bicarbonate
Orthophosphate
TDS
Sulfate
Chloride
Bromide
Utility TWENTYNINE PALMS WATER DISTRICTPopulation served 18,795Owner Local government
Older violation on record
Violations on file
Fluoride
Older/archived health-based violation
Found at 1 of 1 provider
Often added deliberately for dental health; can also occur naturally.
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2023
Arsenic
Detected: 2.1 UG/L (ppb)
10/6/2025
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: 7.2 UG/L (ppb)
8/11/2025
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.
Bromoform
Detected: 4.7 UG/L (ppb)
8/11/2025
Dibromochloromethane
Detected: 2.5 UG/L (ppb)
8/11/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Fluoride
Detected: 1.4 MG/L (ppm)
10/27/2025
Often added deliberately for dental health; can also occur naturally.
Sulfate
Detected: 41 MG/L (ppm)
2/25/2025
Chloride
Detected: 11 MG/L (ppm)
2/25/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 2.1 MG/L (ppm)
2/25/2025
Potassium
Detected: 1.4 MG/L (ppm)
2/25/2025
Sodium
Detected: 42 MG/L (ppm)
2/25/2025
Calcium
Detected: 25 MG/L (ppm)
2/25/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
pH
Detected: 7.9 PH
10/27/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
Langelier Index (pH(s))
Detected: 0.62 LANG
2/19/2025
Hardness, Total (ASCACO3)
Detected: 72 MG/L (ppm)
2/25/2025
Orthophosphate
Detected: 0.092 MG/L (ppm)
2/25/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 27 µg/L (ppb)
4/14/2025
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
Bromide
Detected: 0.061 MG/L (ppm)
2/25/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 120 MG/L (ppm)
2/25/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 11.81 AGGR
2/19/2025
Langelier Index (Source Temp.)
Detected: 0.09 LANG
2/19/2025
Alkalinity, Total
Detected: 100 MG/L (ppm)
2/25/2025
TDS
Detected: 230 MG/L (ppm)
2/25/2025
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.