WINTERS is served by 4 water providers on file with the EPA.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for WINTERS, CA
4 water providers on file serving this city.
Quick answer: WINTERS's water has no violations on file and no single reading stands out against its peers (4 other providers in this area). It serves roughly 7,115 people, and the full breakdown below reflects everything EPA and California have on record for it.
Nitrate
Lead Summary
Lithium
PFNA
Aggressive Index
Langelier Index (pH(s))
Magnesium
Calcium
Sodium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Chloride
Sulfate
Fluoride
Nitrate-Nitrite
Turbidity
pH
Odor
1, 2, 3-Trichloropropane
Chromium, Hex
Chromium
Barium
Conductivity (at 25°C)
Copper, Free
Gross Alpha Particle Activity
TTHM
Perchlorate
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
Found at 3 providers
Chromium, Hex
Detected: 4.2 UG/L (ppb)
Found at 3 providers
Chromium
Detected: 18 UG/L (ppb)
5/22/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Barium
Detected: 78 UG/L (ppb)
5/22/2025
Copper, Free
Detected: 260 UG/L (ppb)
8/23/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 13 UG/L (ppb)
2/11/2025
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.
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 14 MG/L (ppm)
Found at 4 providers
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Chloride
Detected: 9.5 MG/L (ppm)
5/22/2025
Sulfate
Detected: 31 MG/L (ppm)
5/22/2025
Fluoride
Detected: 0.13 MG/L (ppm)
5/22/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate-Nitrite
Detected: 1.1 MG/L (ppm)
5/22/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 36 MG/L (ppm)
5/22/2025
Calcium
Detected: 30 MG/L (ppm)
5/22/2025
Sodium
Detected: 15 MG/L (ppm)
5/22/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 0.15 LANG
5/22/2025
Hardness, Total (ASCACO3)
Detected: 220 MG/L (ppm)
5/22/2025
pH
Detected: 8 PH
5/22/2025
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: 2.49 PCI/L
8/12/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 9.7 µg/L (ppb)
12/11/2023
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
PFNA
Detected: 0.0042 µg/L (ppb)
8/14/2023
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
1, 2, 3-Trichloropropane
Detected: 0.015 UG/L (ppb)
5/22/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 200 MG/L (ppm)
5/22/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 12.2 AGGR
5/22/2025
Alkalinity, Total
Detected: 200 MG/L (ppm)
5/22/2025
TDS
Detected: 280 MG/L (ppm)
5/22/2025
Turbidity
Detected: 0.34 NTU
5/22/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 2.8 TON
5/22/2025
Conductivity (at 25°C)
Detected: 470 UMHO/CM
5/22/2025
Perchlorate
Detected: 1 UG/L (ppb)
2/25/2025
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
Filtration considerations: General system types, not a specific product recommendation.