TRACY is served by 1 water provider on file with the EPA.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for TRACY, CA
1 water provider on file serving this city.
Quick answer: TRACY's water has no violations on file and no single reading stands out against its peers (1 other providers in this area). It serves roughly 96,609 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Lithium
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Monobromoaceticacid
Monochloroaceticacid
Langelier Index (pH(s))
Langelier Index (Source Temp.)
Magnesium
Potassium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Sulfate
Chloride
Nitrate
Turbidity
pH
Boron, Total
Manganese
Chromium, Hex
Barium
Conductivity (at 25°C)
Perfluorohexanesulfonicacid (PFHxS)
Perfluoroctanoicacid (PFOA)
Perfluorohexanoicacid (PFHXA)
Radium-226
Radium-228
Combined Radium (-226 & -228)
Fluoride
Odor
Iron
Nickel
Chromium
Arsenic
Copper, Free
Aluminum
Color
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2024
Manganese
Detected: 5 UG/L (ppb)
6/3/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Chromium, Hex
Detected: 0.043 UG/L (ppb)
7/2/2025
Barium
Detected: 24 UG/L (ppb)
6/3/2025
Iron
Detected: 760 UG/L (ppb)
6/3/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Nickel
Detected: 2 UG/L (ppb)
6/3/2025
Chromium
Detected: 1.6 UG/L (ppb)
6/3/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Arsenic
Detected: 1.9 UG/L (ppb)
6/3/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Copper, Free
Detected: 2.1 UG/L (ppb)
6/3/2025
Aluminum
Detected: 610 UG/L (ppb)
6/3/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 20 UG/L (ppb)
8/14/2025
TTHM
Detected: 33 UG/L (ppb)
8/14/2025
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: 15 UG/L (ppb)
8/14/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 1.1 UG/L (ppb)
8/14/2025
Bromodichloromethane
Detected: 10 UG/L (ppb)
8/14/2025
Dibromochloromethane
Detected: 6.6 UG/L (ppb)
8/14/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Sulfate
Detected: 41 MG/L (ppm)
6/3/2025
Chloride
Detected: 30 MG/L (ppm)
6/3/2025
Nitrate
Detected: 1.9 MG/L (ppm)
6/11/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Boron, Total
Detected: 84 UG/L (ppb)
6/3/2025
Fluoride
Detected: 0.066 MG/L (ppm)
6/3/2025
Often added deliberately for dental health; can also occur naturally.
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 6.9 MG/L (ppm)
6/3/2025
Potassium
Detected: 1.4 MG/L (ppm)
6/3/2025
Sodium
Detected: 23 MG/L (ppm)
6/3/2025
Calcium
Detected: 14 MG/L (ppm)
6/3/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: -0.69 LANG
6/3/2025
Hardness, Total (ASCACO3)
Detected: 63 MG/L (ppm)
6/3/2025
pH
Detected: 7.5 PH
6/3/2025
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: 28.5 µg/L (ppb)
4/9/2025
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: 37 MG/L (ppm)
6/3/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 8.9 UG/L (ppb)
8/14/2025
Trichloroaceticacid
Detected: 8.5 UG/L (ppb)
8/14/2025
Dibromoaceticacid
Detected: 2.3 UG/L (ppb)
8/14/2025
Monobromoaceticacid
Detected: 1.3 UG/L (ppb)
4/10/2025
Monochloroaceticacid
Detected: 2.2 UG/L (ppb)
4/10/2025
Langelier Index (Source Temp.)
Detected: -1.2 LANG
6/3/2025
Alkalinity, Total
Detected: 37 MG/L (ppm)
6/3/2025
TDS
Detected: 150 MG/L (ppm)
6/3/2025
Turbidity
Detected: 0.15 NTU
6/3/2025
A measure of water cloudiness from suspended particles.
Conductivity (at 25°C)
Detected: 260 UMHO/CM
6/3/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 4.2 NG/L (ppt)
10/14/2025
Perfluoroctanoicacid (PFOA)
Detected: 4.2 NG/L (ppt)
10/14/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorohexanoicacid (PFHXA)
Detected: 3 NG/L (ppt)
7/9/2025
Radium-226
Detected: 0.27 PCI/L
8/13/2025
Radium-228
Detected: 0.62 PCI/L
8/20/2025
Combined Radium (-226 & -228)
Detected: 0.62 PCI/L
8/20/2025
A naturally occurring radioactive element found in some groundwater.
Odor
Detected: 1 TON
7/2/2025
Color
Detected: 25 UNITS
6/3/2025
Filtration considerations: General system types, not a specific product recommendation.