Tap water · CA
City of Fresno Water Division
EPA system ID CA1010007 · serves about 545,716 people. Every US utility must publish an annual water quality report — here’s the official one (2025), and below it, our plain-English translation.
Read the official report →What City of Fresno Water Division found in 2025
32 detected analytes from the utility’s own annual report, hand-normalized — nothing was near or over a federal health-based limit.
| Detected | Level | Limit | % of limit | Status |
|---|---|---|---|---|
| Nitrate (N) | 4.8 mg/L | 10 mg/L | 48% | Within limit |
| Chlorine (NAOCL) | 1.45 mg/L | 4 mg/L | 36% | Within limit |
| Arsenic (As) | 3.15 ug/L | 10 ug/L | 32% | Within limit |
| Hexavalent Chromium | 2.5 ug/L | 10 ug/L | 25% | Within limit |
| Gross Alpha Activity | 3.73 pCi/L | 15 pCi/L | 25% | Within limit |
| Total Dissolved Solids (TDS) | 186.8 mg/L | 1,000 mg/L | 19% | Within limit |
| Specific Conductance (E.C.) (umho/cm+) | 287.8 umho/cm+ | 1,600 umho/cm+ | 18% | Within limit |
| Total Coliform Bacteria | 0.82 % | 5 % | 16% | Within limit |
| Copper (mg/L) (August 2025) | 0.18 mg/L | 1.3 mg/L | 14% | Within limit |
| 1,2,3-Trichloropropane (TCP) | 0.45 ng/L | 5 ng/L | 9% | Within limit |
| Haloacetic Acids (HAA5) | 4.3 ug/L | 60 ug/L | 7% | Within limit |
| Trichloroethylene (TCE) | 0.32 ug/L | 5 ug/L | 6% | Within limit |
| Fluoride | 0.12 mg/L | 2 mg/L | 6% | Within limit |
| Iron (Fe) | 14 ug/L | 300 ug/L | 5% | Within limit |
| Chloride | 10 mg/L | 250 mg/L | 4% | Within limit |
| Barium (Ba) | 0.04 mg/L | 1 mg/L | 4% | Within limit |
| Tetrachloroethylene (PCE) | 0.07 ug/L | 5 ug/L | 1% | Within limit |
| Sulfate (SO4) | 5.8 mg/L | 500 mg/L | 1% | Within limit |
| Manganese (Mn) | 0.5 ug/L | 50 ug/L | 1% | Within limit |
| Copper (Cu) | 3.3 ug/L | 1,300 ug/L | 0% | Within limit |
| Total Trihalomethanes (TTHM) | 0.18 ug/L | 80 ug/L | 0% | Within limit |
| Dibromochloropropane (DBCP) | 0.02 ng/L | 200 ng/L | 0% | Within limit |
| Total Hardness (as CaCO3) | 129 mg/L, GPG | — | — | No federal limit |
| Sodium (Na) | 27 mg/L | — | — | No federal limit |
| Perfluorohexanoic Acid (PFHxA) | 1.8 ng/l | — | — | No federal limit |
| Perfluorooctanesulfonic Acid (PFOS) | 1.58 ng/L | — | — | No federal limit |
| Perfluorooctanoic Acid (PFOA) | 1.33 ng/L | — | — | No federal limit |
| Perfluorohexanesulfonic acid (PFHxS) ng/L | 0.91 ng/L | — | — | No federal limit |
| Manganese | 0.51 ug/L | — | — | No federal limit |
| Perfluorobutanesulfonic acid (PFBS) | 0.46 ng/L | — | — | No federal limit |
| Turbidity (highest) (highest of multiple sources) | 0.159 NTU | — | — | No federal limit |
| E.coli | 0 | — | — | No federal limit |
Levels and limits are as printed in the utility’s report (“limit” is the EPA MCL, action level, residual limit, or secondary guideline that applies to that row; “ND” = not detected). Utilities publish these reports annually — we re-check every covered utility each July, after the federal publication deadline. Detected doesn’t mean dangerous — most detections sit far below their limits. This is education, not medical advice.
Your tap, if it were a bottle
How City of Fresno Water Division water stacks up against the bottled aisle
Same minerals, same units — the tap values below come from the utility’s report, placed next to the closest match in our bottled-water database.
| Mineral | Your tap | Closest bottled match |
|---|---|---|
| Total dissolved solids | 186.8 mg/L | Highland Spring at 170 mg/L |
| Sodium | 27 mg/L | Buxton at 24 mg/L |
| Sulfate | 5.8 mg/L | Waiakea at 5.9 mg/L |
| Chloride | 10 mg/L | Evian at 10 mg/L |
Tap values are the headline levels from the utility’s annual report (often a highest or average figure); bottled values are label- or report-derived. A closest match is a numeric comparison, not an equivalence or an endorsement.
Zip codes covered
93701 · 93702 · 93703 · 93704 · 93705 · 93710 · 93711 · 93720 · 93721 · 93722 · 93726 · 93728 · 93730
Boundary zips partially served by other systems are deliberately unlisted — check your exact zip.