SANTA CLARA is served by 2 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 SANTA CLARA, CA
2 water providers on file serving this city.
Quick answer: SANTA CLARA's water has no violations on file and no single reading stands out against its peers (2 other providers in this area). It serves roughly 130,746 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Lithium
Magnesium
Potassium
Sodium
Hardness, Total (ASCACO3)
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Chloride
Sulfate
Fluoride
Nitrate
Nitrate-Nitrite
Turbidity
pH
Odor
Iron
Chromium, Hex
Perchlorate
Trichlorotrifluoroethane
Barium
Conductivity (at 25°C)
Color
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Bromoform
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.0033 mg/L (ppm)
12/31/2022
Iron
Detected: 200 UG/L (ppb)
8/11/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Chromium, Hex
Detected: 1.7 UG/L (ppb)
8/11/2025
Barium
Detected: 110 UG/L (ppb)
8/11/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 46.9 UG/L (ppb)
7/17/2025
TTHM
Detected: 37 UG/L (ppb)
7/17/2025
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: 37 UG/L (ppb)
7/17/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 0.75 UG/L (ppb)
7/17/2025
Dibromochloromethane
Detected: 2.3 UG/L (ppb)
7/17/2025
Bromoform
Detected: 0.7 UG/L (ppb)
7/17/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 62 MG/L (ppm)
8/11/2025
Sulfate
Detected: 50 MG/L (ppm)
8/11/2025
Fluoride
Detected: 0.18 MG/L (ppm)
8/7/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 0.38 MG/L (ppm)
8/13/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Nitrate-Nitrite
Detected: 4.1 MG/L (ppm)
8/11/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 21 MG/L (ppm)
8/11/2025
Potassium
Detected: 1.2 MG/L (ppm)
8/11/2025
Sodium
Detected: 26 MG/L (ppm)
8/11/2025
Calcium
Detected: 89 MG/L (ppm)
8/11/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 310 MG/L (ppm)
8/11/2025
pH
Detected: 7.69 PH
8/11/2025
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
Lithium
Detected: 11 µg/L (ppb)
3/5/2025
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: 218 MG/L (ppm)
8/11/2025
Other
Additional substances tested that don't fit neatly into the categories above
Alkalinity, Total
Detected: 218 MG/L (ppm)
8/11/2025
TDS
Detected: 490 MG/L (ppm)
8/11/2025
Turbidity
Detected: 0.36 NTU
8/11/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 2 TON
8/11/2025
Perchlorate
Detected: 0.79 UG/L (ppb)
10/16/2025
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
Trichlorotrifluoroethane
Detected: 0.47 UG/L (ppb)
8/11/2025
Conductivity (at 25°C)
Detected: 646 UMHO/CM
8/11/2025
Color
Detected: 2 UNITS
8/11/2025
Dichloroaceticacid
Detected: 25.2 UG/L (ppb)
7/17/2025
Trichloroaceticacid
Detected: 20.4 UG/L (ppb)
7/17/2025
Filtration considerations: General system types, not a specific product recommendation.