Tap Water Quality Report
Tap water quality in WAIPAHU-EWA-WAIANAE, Hawaii
Tap water in WAIPAHU-EWA-WAIANAE, Hawaii receives a grade of C (74/100) from TapWaterSafety.org. It's served by WAIPAHU-EWA-WAIANAE. The most significant water quality concerns are: Chromium (hexavalent) significantly above health guideline; 1,2,3-Trichloropropane significantly above health guideline; Nitrate significantly above health guideline; Arsenic detected. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in WAIPAHU-EWA-WAIANAE's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving WAIPAHU-EWA-WAIANAE.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 2.04 ppb, 102x above the EWG health guideline of 0.02 ppb.
1,2,3-Trichloropropane significantly above health guideline
Moderate concern1,2,3-Trichloropropane detected at 0.0532 ppb, 76x above the EWG health guideline of 0.0007 ppb.
Nitrate significantly above health guideline
Moderate concernNitrate detected at 3.04 ppm, 22x above the EWG health guideline of 0.14 ppm.
Arsenic detected
Moderate concernArsenic detected at 0.0828 ppb.
Recommended filters for WAIPAHU-EWA-WAIANAE
Filters matched to the specific contaminants in WAIPAHU-EWA-WAIANAE's water supply.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
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 WAIPAHU-EWA-WAIANAE'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 |
|---|---|---|---|---|---|---|---|---|
| Chromium (hexavalent) Heavy metal |
2.04 ppb | 0.02 | — | — | — | — | — | 102× over |
| 1,2,3-Trichloropropane Other |
0.0532 ppb | 0.0007 | — | — | — | — | — | 76× over |
| Nitrate Inorganic |
3.04 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 22× over |
| Arsenic Heavy metal |
0.0828 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 21× over |
| Nitrate and nitrite Inorganic |
3.0 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 21× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
0.84 ppb | 0.06 | — | — | — | — | — | 14× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
1.03 ppb | 0.15 | 80.0 | 100 | — | — | — | 6.8× over |
| Bromoform Disinfection byproduct |
0.964 ppb | 0.5 | — | — | — | — | — | 1.9× over |
| Vanadium Other |
28.2 ppb | 21.0 | — | — | — | — | — | 1.3× over |
| Dibromochloromethane Disinfection byproduct |
0.0361 ppb | 0.1 | — | — | — | — | — | Below guideline |
| 1,2-Dibromo-3-chloropropane (DBCP) Other |
0.000247 ppb | 0.0017 | 0.2 | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
20.9 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Selenium Heavy metal |
0.516 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Ethylene dibromide Other |
0.000113 ppb | 0.01 | 0.05 | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.488 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Barium Heavy metal |
2.46 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.097 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.113 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.149 ppb | — | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
1.66 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.162 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 WAIPAHU-EWA-WAIANAE.