Tap Water Quality Report
Tap water quality in TUSTIN, California
Tap water in TUSTIN, California receives a grade of F (52/100) from TapWaterSafety.org. It's served by CITY OF TUSTIN. The most significant water quality concerns are: PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in TUSTIN's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving TUSTIN.
PFAS contamination
Severe concernPerfluorooctane sulfonate (PFOS), Perfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 4.87 ppt, 4870x above the EWG health guideline of 0.001 ppt.
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.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 23.3 ppb, 155x above the EWG health guideline of 0.15 ppb.
Recommended filters for TUSTIN
Filters matched to the specific contaminants in TUSTIN's water supply.
Reverse Osmosis or NSF P473 certified carbon
$80-$750Activated carbon and RO are the only technologies proven to remove PFAS at certified levels.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
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 TUSTIN'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 |
|---|---|---|---|---|---|---|---|---|
| Perfluorooctanoic acid (PFOA) PFAS |
5.43 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | EPA violation |
| Perfluorooctane sulfonate (PFOS) PFAS |
5.7 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | EPA violation |
| Perfluorohexane sulfonate (PFHXS) PFAS |
4.87 ppt | 0.001 | 10.0 | — | — | — | — | 4870× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
36.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 362× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
23.3 ppb | 0.15 | 80.0 | 100 | — | — | — | 155× over |
| Bromodichloromethane Disinfection byproduct |
6.39 ppb | 0.06 | — | — | — | — | — | 106× over |
| Dibromochloromethane Disinfection byproduct |
7.38 ppb | 0.1 | — | — | — | — | — | 74× over |
| Dibromoacetic acid Disinfection byproduct |
1.83 ppb | 0.03 | — | — | — | — | — | 61× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
3.21 ppb | 0.06 | — | — | — | — | — | 54× over |
| Nitrate Inorganic |
3.39 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 24× over |
| Nitrate and nitrite Inorganic |
3.29 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 23× over |
| Trichloroacetic acid Disinfection byproduct |
1.99 ppb | 0.1 | — | — | — | — | — | 20× over |
| Chloroform Disinfection byproduct |
5.71 ppb | 0.4 | — | — | — | — | — | 14× over |
| Dichloroacetic acid Disinfection byproduct |
2.8 ppb | 0.2 | — | — | — | — | — | 14× over |
| Bromoform Disinfection byproduct |
3.81 ppb | 0.5 | — | — | — | — | — | 7.6× over |
| Chromium (hexavalent) Heavy metal |
0.093 ppb | 0.02 | — | — | — | — | — | 4.7× over |
| Uranium Radiological |
1.17 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 2.7× over |
| Chlorate Disinfection byproduct |
55.2 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
7.5 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
2.96 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Perfluoropentane sulfonic acid (PFPeS) PFAS |
0.105 ppt | 1.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
67.8 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Selenium Heavy metal |
2.3 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.0194 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Aluminum Heavy metal |
20.1 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Monobromoacetic acid* Disinfection byproduct |
0.465 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Perchlorate Disinfection byproduct |
0.0132 ppb | 1.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.794 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
5.21 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
4.25 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
2.48 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
1.65 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
3.01 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.801 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Bromide Other |
201.4 ppb | — | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.171 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.0338 ppb | — | — | — | — | — | — | Below guideline |
| Lithium Other |
22.2 ppb | — | — | — | — | — | — | 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 CITY OF TUSTIN.