Tap Water Quality Report
Tap water quality in SURPRISE, Arizona
Tap water in SURPRISE, Arizona receives a grade of D (62/100) from TapWaterSafety.org. It's served by EPCOR - AGUA FRIA. The most significant water quality concerns are: Arsenic significantly above health guideline; Chromium (hexavalent) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in SURPRISE's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving SURPRISE.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 3.71 ppb, 927x above the EWG health guideline of 0.004 ppb.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 10.1 ppb, 503x above the EWG health guideline of 0.02 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 19.0 ppb, 316x above the EWG health guideline of 0.06 ppb.
Recommended filters for SURPRISE
Filters matched to the specific contaminants in SURPRISE's water supply.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
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 SURPRISE'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 |
3.71 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 927× over |
| Chromium (hexavalent) Heavy metal |
10.1 ppb | 0.02 | — | — | — | — | — | 503× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
19.0 ppb | 0.06 | — | — | — | — | — | 316× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
37.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 250× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
11.0 ppb | 0.1 | 60.0 | 60 | — | — | — | 110× over |
| Nitrate Inorganic |
0.927 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 6.6× over |
| Nitrate and nitrite Inorganic |
0.93 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 6.6× over |
| Radium, combined (-226 and -228) Radiological |
0.06 pCi/L | 0.05 | 5.0 | — | — | — | — | 1.2× over |
| Bromochloromethane Other |
0.0482 ppb | 0.06 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
135.3 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
8.25 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Cadmium Heavy metal |
0.0111 ppb | 0.04 | 5.0 | 5 | 3 | 0.04 | — | Below guideline |
| Molybdenum Other |
4.49 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
53.6 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Manganese Heavy metal |
1.54 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Selenium Heavy metal |
0.211 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| 2,4-D Pesticide/Herbicide |
0.0751 ppb | 20.0 | 70.0 | — | — | — | — | Below guideline |
| Strontium Radiological |
0.853 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
19.2 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.671 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.158 ppb | — | — | — | — | — | — | Below guideline |
| Lithium Other |
65.9 ppb | — | — | — | — | — | — | Below guideline |
| Quinoline Other |
0.00648 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 EPCOR - AGUA FRIA.