Drinking water quality · 2025
· Verified
What's in Tracy, City of, CA tap water
91 contaminants were measured in the Tracy, City of, CA water system's 2025 annual report. Each is shown below against its federal limit — 4 sit at or above that limit.
- Reporting year
- 2025
- Contaminants measured
- 91
- Over federal limit
- 4
- Approaching the limit
- 0
- Worst contaminant
- Iron
- Service area
- CA
2.5× the limit
state-level CCR
PFAS — EPA UCMR5 (2023–2025)
1 PFAS compound detected in Tracy, City of, CA
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
Lithium
● Detected (no federal limit)Measured 28.5 mg/LSample year 2025Samples 2 detect / 2
below national p90 (76.59999999999991 mg/L across detecting U.S. systems)
PWSID CA3910011 · Source: EPA UCMR5. Limits per EPA's April 2024 PFAS National Primary Drinking Water Regulation. PFAS values reported in nanograms per liter (ng/L) — note that 1 ng/L = 1 part per trillion.
Where your water comes from · EPA SDWIS
Tracy, City of, CA's drinking water comes from ground water, drawn from 10 sources.
Source
10ground water
- PRODUCTION · 8
- WELL 04R - NEW LINCOLN PARK WELL
- DMC - RAW
Treatment
9treatment plants
- PRODUCTION WELL 01 - TREATED
- PRODUCTION WELL 05 - TREATED
- PRODUCTION WELL 06 - TREATED
- + 6 more
Distribution
0storage units
Also buys water from SOUTH SAN JOAQUIN IRRIGATION DISTRICT.
Source: EPA SDWIS facilities inventory. Methodology.
Historical readings · EPA Six-Year Review (2012–2019)
1 contaminant historically over EPA limits in Tracy, City of, CA
Every U.S. public water system reports compliance-monitoring data to EPA. The Six-Year Review releases the 2012–2019 window as a single dataset — here's what your system reported, year by year. Values shown are the highest detection per analyte per year, compared to the federal MCL.
| Contaminant | Worst detection | EPA limit | Years (2012–2019) |
|---|---|---|---|
TTHM worst: 2015 | 0.12 mg/L 1.5× | 0.08 mg/L | '12'13'14'15'16'17'18'19 |
HAA5 worst: 2019 | 0.05 mg/L 83% | 0.06 mg/L | '12'13'14'15'16'17'18'19 |
ARSENIC worst: 2014 | 0.0056 mg/L within below national p90 | 0.01 mg/L | '12'13'14'15'16'17'18 |
NITRATE worst: 2019 | 3.6 mg/L within | 10 mg/L | '12'13'14'15'16'17'18'19 |
NITRATE NITRITE worst: 2019 | 3.6 mg/L within | 10 mg/L | '16'17'18'19 |
DICHLOROMETHANE worst: 2017 | 0.0014 mg/L within | 0.005 mg/L | '12'13'16'17 |
FLUORIDE worst: 2016 | 0.3 mg/L within | 4 mg/L | '12'13'14'15'16'17'18 |
URANIUM worst: 2016 | 0.00238 ug/L within below national p90 | 30 ug/L | '14'16 |
TCAA worst: 2012 | 0.0078 mg/L | — | '12'13'14'15'16'17'18'19 |
DBAA worst: 2012 | 0.0057 mg/L | — | '12'13'14'15'16'17'18'19 |
DCAA worst: 2012 | 0.013 mg/L | — | '12'13'14'15'16'17'18'19 |
MBAA worst: 2014 | 0.001 mg/L | — | '14'19 |
MCAA worst: 2019 | 0.0021 mg/L | — | '19 |
BROMODICHLOROMETHANE worst: 2012 | 0.016 mg/L | — | '12'13'14'15'16'17'18'19 |
BROMOFORM worst: 2012 | 0.016 mg/L | — | '12'13'14'15'16'17'18'19 |
CHLOROFORM worst: 2012 | 0.022 mg/L | — | '12'13'14'15'16'17'18'19 |
DIBROMOCHLOROMETHANE worst: 2012 | 0.028 mg/L | — | '12'13'14'15'16'17'18'19 |
PWSID CA3910011 · Source: EPA Six-Year Review 4 (2012–2019). Values are the highest detection in each calendar year; non-detect years are omitted. Year tags above show every year with a detection.
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| IronA naturally occurring metal common in groundwater. | 760 UG/LAverageSource water | 300 UG/LMCL | At or above the limit |
| ManganeseA naturally occurring metal from soil and rock. | 57 UG/LAverageSource water | 50 UG/LMCL | At or above the limit |
| AluminumA common element sometimes used as a treatment coagulant. | 610 UG/LAverageSource water | 1000 UG/LMCL | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 28 UG/LAverageSource water | 1000 UG/LMCL | Within the limit |
| NickelA metal from natural deposits and industrial discharge. | 2 UG/LAverageSource water | 100 UG/LMCL | Within the limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0.052 UG/LAverageSource water | 10 UG/LMCL | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 2.1 UG/LAverageSource water | 1000 UG/LMCL | Within the limit |
| Antimony | Not detected UG/LHighest single sampleSource water | 6 UG/LMCL | None detected |
| Beryllium | Not detected UG/LHighest single sampleSource water | 4 UG/LMCL | None detected |
| Cadmium | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected UG/LHighest single sampleEntry point | None set | None detected |
| MercuryA toxic metal from erosion of natural deposits and industrial runoff. | Not detected UG/LHighest single sampleSource water | 2 UG/LMCL | None detected |
| SeleniumA trace element from natural deposits and industrial discharge. | Not detected UG/LHighest single sampleSource water | 50 UG/LMCL | None detected |
| Thallium | Not detected UG/LHighest single sampleSource water | 2 UG/LMCL | None detected |
| ZincA naturally occurring metal that can also enter water from corroding pipes. | Not detected UG/LHighest single sampleEntry point | 5000 UG/LMCL | None detected |
| BoronA naturally occurring element from rock and soil. | 84 UG/LAverageEntry point | None set | Detected — no federal limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 8 MG/LAverageEntry point | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 7.1 MG/LAverageSource water | None set | Detected — no federal limit |
| PotassiumA naturally occurring mineral from rock and soil. | 1.6 MG/LAverageSource water | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 23 MG/LAverageEntry point | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ColorA measure of visible tint in the water. | 25 UNITSAverageSource water | 15 UNITSMCL | At or above the limit |
| TurbidityA measure of cloudiness from suspended particles in the water. | 8 NTUAverageSource water | 5 NTUMCL | At or above the limit |
| OdorA measure of detectable smell in the water. | 1 TONAverageSource water | 3 TONMCL | Within the limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 260 UMHO/CMAverageEntry point | 1600 UMHO/CMMCL | Within the limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 150 MG/LAverageEntry point | 1000 MG/LMCL | Within the limit |
| AlkalinityA measure of the water's capacity to neutralize acids. | 38.666666666666664 MG/LAverageSource water | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 63 MG/LAverageEntry point | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 8 PHAverageSource water | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| SulfateA naturally occurring mineral from rock and soil. | 41 MG/LAverageEntry point | 500 MG/LMCL | Within the limit |
| ChlorideA naturally occurring salt compound. | 30 MG/LAverageEntry point | 500 MG/LMCL | Within the limit |
| Asbestos | Not detected MFLHighest single sampleSource water | 7 MFLMCL | None detected |
| NitriteA compound from fertilizer runoff, sewage, and erosion of natural deposits. | Not detected MG/LHighest single sampleSource water | 1 MG/LMCL | None detected |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0.26428571428571435 PCI/LAverageSource water | 5 PCI/LMCL | Within the limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | 1.6 UG/LAverageSource water | 50 UG/LMCL | Within the limit |
| Carbon Tetrachloride | Not detected UG/LHighest single sampleEntry point | 0.5 UG/LMCL | None detected |
| Chlorobenzene | Not detected UG/LHighest single sampleSource water | 70 UG/LMCL | None detected |
| Cis Dichloroethylene 12 | Not detected UG/LHighest single sampleSource water | 6 UG/LMCL | None detected |
| Dichloroethane 12 | Not detected UG/LHighest single sampleSource water | 0.5 UG/LMCL | None detected |
| Dichloroethylene 11 | Not detected UG/LHighest single sampleEntry point | 6 UG/LMCL | None detected |
| Dichloropropane 12 | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| O Dichlorobenzene | Not detected UG/LHighest single sampleEntry point | 600 UG/LMCL | None detected |
| P Dichlorobenzene | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Pce | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Styrene | Not detected UG/LHighest single sampleSource water | 100 UG/LMCL | None detected |
| Tce | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Trans Dichloroethylene 12 | Not detected UG/LHighest single sampleSource water | 10 UG/LMCL | None detected |
| Trichlorobenzene 124 | Not detected UG/LHighest single sampleEntry point | 5 UG/LMCL | None detected |
| Trichloroethane 111 | Not detected UG/LHighest single sampleSource water | 200 UG/LMCL | None detected |
| Trichloroethane 112 | Not detected UG/LHighest single sampleSource water | 5 UG/LMCL | None detected |
| Vinyl Chloride | Not detected UG/LHighest single sampleEntry point | 0.5 UG/LMCL | None detected |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | Not detected UG/LHighest single sampleEntry point | 6 UG/LMCL | None detected |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid, a chlorinated PFAS compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)ADONA, a newer-generation PFAS replacement compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| 4:2 Fluorotelomer sulfonic acid (4:2 FTS)4:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| 6:2 Fluorotelomer sulfonic acid (6:2 FTS)6:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| 8:2 Fluorotelomer sulfonic acid (8:2 FTS)8:2 fluorotelomer sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid, a chlorinated PFAS compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Hexafluoropropylene oxide dimer acidHFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoro-3-methoxypropanoic acid (PFMPA)Perfluoro-3-methoxypropanoic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoro-4-methoxybutanoic acid (PFMBA)Perfluoro-4-methoxybutanoic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)Perfluoro(2-ethoxyethane)sulfonic acid, a PFAS-related compound. | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorodecanoic acid (PFDA)Perfluorodecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorododecanoic acid (PFDoA)Perfluorododecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoroheptanesulfonic acid (PFHpS)Perfluoroheptanesulfonic acid, a PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorononanoic acidPerfluorononanoic acid, a PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoropentanesulfonic acid (PFPeS)Perfluoropentanesulfonic acid, a PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluoroundecanoic acid (PFUnA)Perfluoroundecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' | Not detected NG/LHighest single sampleSource water | None set | None detected |
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | 1.1666666666666667 NG/LAverageSource water | None set | Detected — no federal limit |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Benzene | Not detected UG/LHighest single sampleEntry point | 1 UG/LMCL | None detected |
| Ethylbenzene | Not detected UG/LHighest single sampleEntry point | 300 UG/LMCL | None detected |
| Toluene | Not detected UG/LHighest single sampleSource water | 150 UG/LMCL | None detected |
| XylenesA group of industrial solvents found in gasoline and paint. | Not detected UG/LHighest single sampleEntry point | 1750 UG/LMCL | None detected |
Source: Tracy, City of, CA's 2025 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.
People also ask about Tracy, City of, CA's water
+Is Tracy, City of, CA tap water safe to drink in 2025?
The 2025 Consumer Confidence Report for the Tracy, City of, CA water utility lists 4 contaminants at or above the federal limit: Iron, Color, Turbidity, and Manganese. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in Tracy, City of, CA tap water?
91 contaminants were measured in Tracy, City of, CA's 2025 Consumer Confidence Report, spanning metals, other, and pfas ("forever chemicals"). 52 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in Tracy, City of, CA tap water?
4 contaminants in Tracy, City of, CA's 2025 report sit at or above the federal limit: Iron (2.5× the limit); Color (1.7× the limit); Turbidity (1.6× the limit); Manganese (1.1× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in Tracy, City of, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2025 report is Iron, at 2.5× the federal threshold. It belongs to the metals family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Tracy, City of, CA's 2025 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Tracy, City of, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2025 report; a new report will replace it once the utility publishes its next annual update.
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