CRESTLINE VILLAGE CWD - DIVISION 10 Water Quality Report
Serving roughly 11,650 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 CRESTLINE VILLAGE CWD - DIVISION 10
1 water provider directly on file, serving roughly 11,650 people in San Bernardino County, California.
Quick answer: CRESTLINE VILLAGE CWD - DIVISION 10 has no violations on file. One reading is worth knowing about: PFHXS was measured at 0.0175µg/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.
Copper Summary
Lead Summary
PFHXA
PFPEA
Lithium
PFBS
PFHXS
PFNA
PFOS
PFOA
Aggressive Index
Langelier Index (pH(s))
Langelier Index (Source Temp.)
Magnesium
Potassium
Sodium
Calcium
Hardness, Total (ASCACO3)
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Sulfate
Chloride
Nitrate
Nitrate-Nitrite
pH
Odor
Conductivity (at 25°C)
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Foamingagents (SURFACTANTS)
Turbidity
Combined Uranium
Gross Alpha Particle Activity
Utility CRESTLINE VILLAGE CWD - DIVISION 10Population served 11,650Owner Local government
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Copper Summary
Detected: 1.6 mg/L (ppm)
12/31/2006
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2023
Combined Uranium
Detected: 2.8 PCI/L
9/30/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 5.7 UG/L (ppb)
9/30/2025
TTHM
Detected: 40.6 UG/L (ppb)
9/30/2025
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: 8.8 UG/L (ppb)
9/30/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 7.1 UG/L (ppb)
9/30/2025
Bromodichloromethane
Detected: 12.8 UG/L (ppb)
9/30/2025
Dibromochloromethane
Detected: 11.9 UG/L (ppb)
9/30/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Sulfate
Detected: 8.5 MG/L (ppm)
3/31/2025
Chloride
Detected: 9.6 MG/L (ppm)
9/30/2025
Nitrate
Detected: 1.6 MG/L (ppm)
9/30/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Nitrate-Nitrite
Detected: 1.2 MG/L (ppm)
4/30/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 5.9 MG/L (ppm)
3/31/2025
Potassium
Detected: 1.6 MG/L (ppm)
3/31/2025
Sodium
Detected: 10 MG/L (ppm)
3/31/2025
Calcium
Detected: 21 MG/L (ppm)
4/30/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: -2.64 LANG
4/30/2025
Hardness, Total (ASCACO3)
Detected: 79 MG/L (ppm)
3/31/2025
pH
Detected: 7.1 PH
3/31/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
Gross Alpha Particle Activity
Detected: 3 PCI/L
7/1/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFHXA
Detected: 0.0032 µg/L (ppb)
10/7/2024
PFPEA
Detected: 0.0031 µg/L (ppb)
10/7/2024
Lithium
Detected: 11.7 µg/L (ppb)
1/27/2025
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
PFBS
Detected: 0.004 µg/L (ppb)
10/8/2024
PFHXS
Detected: 0.0175 µg/L (ppb)
10/8/2024
PFNA
Detected: 0.0071 µg/L (ppb)
10/8/2024
PFOS
Detected: 0.0052 µg/L (ppb)
10/8/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFOA
Detected: 0.0045 µg/L (ppb)
4/9/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 94 MG/L (ppm)
3/31/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 8.53 AGGR
4/30/2025
Langelier Index (Source Temp.)
Detected: -3.24 LANG
4/30/2025
Alkalinity, Total
Detected: 82 MG/L (ppm)
4/30/2025
TDS
Detected: 140 MG/L (ppm)
9/30/2025
Odor
Detected: 1 TON
9/30/2025
Conductivity (at 25°C)
Detected: 210 UMHO/CM
4/30/2025
Dichloroaceticacid
Detected: 3.1 UG/L (ppb)
9/30/2025
Trichloroaceticacid
Detected: 2.4 UG/L (ppb)
3/31/2025
Dibromoaceticacid
Detected: 2.6 UG/L (ppb)
9/30/2025
Foamingagents (SURFACTANTS)
Detected: 0.22 MG/L (ppm)
2/28/2025
Turbidity
Detected: 0.23 NTU
7/1/2025
A measure of water cloudiness from suspended particles.
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.