Tap Water Quality Report
Tap water quality in PEARL HARBOR, Hawaii
Tap water in PEARL HARBOR, Hawaii receives a grade of B (86/100) from TapWaterSafety.org. It's served by JOINT BASE PEARL HARBOR-HICKAM. The most significant water quality concerns are: Chromium (hexavalent) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in PEARL HARBOR's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving PEARL HARBOR.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 1.62 ppb, 81x above the EWG health guideline of 0.02 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 2.21 ppb, 15x above the EWG health guideline of 0.15 ppb.
EPA compliance record
Official U.S. EPA records for JOINT BASE PEARL HARBOR-HICKAM (system ID HI0000360) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Public Notice Rule and Revised PN Rule | Other (e.g. public notice) | 11/29/2021 | Open |
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 PEARL HARBOR
Filters matched to the specific contaminants in PEARL HARBOR's water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts like TTHM. Look for NSF/ANSI 53 VOC or chloroform 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 PEARL HARBOR'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 |
1.62 ppb | 0.02 | — | — | — | — | — | 81× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
2.21 ppb | 0.15 | 80.0 | 100 | — | — | — | 15× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
0.524 ppb | 0.06 | — | — | — | — | — | 8.7× over |
| Nitrate Inorganic |
0.852 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 6.1× over |
| Nitrate and nitrite Inorganic |
0.852 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 6.1× over |
| Dibromochloromethane Disinfection byproduct |
0.573 ppb | 0.1 | — | — | — | — | — | 5.7× over |
| Bromoform Disinfection byproduct |
1.63 ppb | 0.5 | — | — | — | — | — | 3.3× over |
| Vanadium Other |
25.1 ppb | 21.0 | — | — | — | — | — | 1.2× over |
| 1,4-Dioxane Semi-volatile organic compound |
0.0583 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Chlorate Disinfection byproduct |
24.8 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.2 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Strontium Radiological |
0.102 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.538 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 JOINT BASE PEARL HARBOR-HICKAM.