Tap Water Quality Report
Tap water quality in TURLOCK, California
Tap water in TURLOCK, California receives a grade of D (68/100) from TapWaterSafety.org. It's served by TURLOCK, CITY OF. The most significant water quality concerns are: Arsenic significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Chromium (hexavalent) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in TURLOCK's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving TURLOCK.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 5.81 ppb, 1451x above the EWG health guideline of 0.004 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 36.2 ppb, 362x above the EWG health guideline of 0.1 ppb.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 5.18 ppb, 259x above the EWG health guideline of 0.02 ppb.
EPA compliance record
Official U.S. EPA records for TURLOCK, CITY OF (system ID CA5010019) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for TURLOCK
Filters matched to the specific contaminants in TURLOCK's water supply.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in TURLOCK's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
5.81 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 1451× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
36.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 362× over |
| Chromium (hexavalent) Heavy metal |
5.18 ppb | 0.02 | — | — | — | — | — | 259× over |
| Nitrate Inorganic |
5.09 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 36× over |
| Tetrachloroethylene (perchloroethylene) Volatile organic compound |
1.31 ppb | 0.06 | 5.0 | — | — | — | — | 22× over |
| 1,2,3-Trichloropropane Other |
0.0118 ppb | 0.0007 | — | — | — | — | — | 17× over |
| Uranium Radiological |
4.36 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 10× over |
| Dibromoacetic acid Disinfection byproduct |
0.281 ppb | 0.03 | — | — | — | — | — | 9.4× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
0.627 ppb | 0.15 | 80.0 | 100 | — | — | — | 4.2× over |
| Vanadium Other |
38.8 ppb | 21.0 | — | — | — | — | — | 1.8× over |
| Bromoform Disinfection byproduct |
0.269 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Dibromochloromethane Disinfection byproduct |
0.0389 ppb | 0.1 | — | — | — | — | — | Below guideline |
| 1,2-Dibromo-3-chloropropane (DBCP) Other |
0.00015 ppb | 0.0017 | 0.2 | — | — | — | — | Below guideline |
| Barium Heavy metal |
58.8 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Molybdenum Other |
1.63 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.0921 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Strontium Radiological |
0.406 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.0947 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from TURLOCK, CITY OF.