Serving roughly 100,744 people in San Bernardino County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for HESPERIA WD
1 water provider directly on file, serving roughly 100,744 people in San Bernardino County, California.
Quick answer: HESPERIA WD has no violations on file. One reading is worth knowing about: Chromium, Hex was measured at 18UG/L, among the highest of the 669 providers on file in this area. It's the most notable figure in this system's record among its 669 local peers.
Lead Summary
6:2 Fts
PFHXS
PFOS
PFHXA
PFOA
PFPEA
PFHPA
Lithium
Lead
TTHM
Bromoform
Copper, Free
Magnesium
Sodium
Calcium
Hardness, Total (ASCACO3)
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Sulfate
Chloride
Fluoride
Nitrate-Nitrite
Nitrate
Perfluorohexanesulfonicacid (PFHxS)
Perfluoroctanesulfonicacid (PFOS)
Perfluoroctanoicacid (PFOA)
Perfluorohexanoicacid (PFHXA)
Perfluoropentanoicacid (PFPEA)
Perfluorobutanesulfonicacid (PFBS)
Perfluoroheptanoicacid (PFHPA)
Gross Alpha Particle Activity
pH
Odor
Vanadium, Total
Chromium, Hex
Chloroform
Chromium
Arsenic
Conductivity (at 25°C)
Utility HESPERIA WDPopulation served 100,744Owner 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: 10 UG/L (ppb)
6/30/2025
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: 50 UG/L (ppb)
7/1/2025
Vanadium, Total
Detected: 31 UG/L (ppb)
7/15/2025
Chromium, Hex
Detected: 18 UG/L (ppb)
10/21/2025
Chromium
Detected: 18 UG/L (ppb)
1/22/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Arsenic
Detected: 3.2 UG/L (ppb)
1/22/2025
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)
4/15/2025
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.
Bromoform
Detected: 1.1 UG/L (ppb)
4/15/2025
Chloroform
Detected: 2.5 UG/L (ppb)
4/1/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Sulfate
Detected: 3.2 MG/L (ppm)
2/13/2025
Chloride
Detected: 5 MG/L (ppm)
2/13/2025
Fluoride
Detected: 0.17 MG/L (ppm)
7/15/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate-Nitrite
Detected: 0.4 MG/L (ppm)
1/28/2025
Nitrate
Detected: 0.4 MG/L (ppm)
1/28/2025
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: 2.8 MG/L (ppm)
2/13/2025
Sodium
Detected: 21 MG/L (ppm)
2/13/2025
Calcium
Detected: 26 MG/L (ppm)
2/13/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 75 MG/L (ppm)
2/13/2025
Gross Alpha Particle Activity
Detected: 3.6 PCI/L
4/1/2025
pH
Detected: 8 PH
2/13/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
6:2 Fts
Detected: 0.0503 µg/L (ppb)
7/19/2023
PFHXS
Detected: 0.0084 µg/L (ppb)
8/13/2024
PFOS
Detected: 0.0099 µg/L (ppb)
8/13/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFHXA
Detected: 0.0037 µg/L (ppb)
8/13/2024
PFOA
Detected: 0.0074 µg/L (ppb)
8/13/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFPEA
Detected: 0.0042 µg/L (ppb)
8/30/2023
PFHPA
Detected: 0.0031 µg/L (ppb)
8/30/2023
Lithium
Detected: 10.2 µg/L (ppb)
8/13/2024
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 140 MG/L (ppm)
2/13/2025
Other
Additional substances tested that don't fit neatly into the categories above
Alkalinity, Total
Detected: 120 MG/L (ppm)
2/13/2025
TDS
Detected: 140 MG/L (ppm)
2/13/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 7.2 NG/L (ppt)
10/2/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 11 NG/L (ppt)
10/2/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 6.6 NG/L (ppt)
10/2/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorohexanoicacid (PFHXA)
Detected: 2.7 NG/L (ppt)
10/2/2025
Perfluoropentanoicacid (PFPEA)
Detected: 2.4 NG/L (ppt)
10/2/2025
Perfluorobutanesulfonicacid (PFBS)
Detected: 2 NG/L (ppt)
3/4/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 2 NG/L (ppt)
3/4/2025
Odor
Detected: 1 TON
2/13/2025
Conductivity (at 25°C)
Detected: 230 UMHO/CM
2/13/2025
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.