Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
3
health-based violations
125
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2013-10-01 → 2013-10-31 |
| MCL | Health-based | Resolved | 2013-10-01 → 2013-10-31 |
| MCL | Health-based | Resolved | 2013-10-01 → 2013-10-31 |
| MR | Monitoring | Resolved | 2008-01-01 → 2010-12-31 |
| MR | Monitoring | Resolved | 2008-01-01 → 2010-12-31 |
| MR | Monitoring | Resolved | 2008-01-01 → 2010-12-31 |
| MR | Monitoring | Resolved | 2008-01-01 → 2010-12-31 |
| MR | Monitoring | Resolved | 2008-01-01 → 2010-12-31 |
| MR | Monitoring | Resolved | 2008-01-01 → 2010-12-31 |
| MR | Monitoring | Resolved | 2008-01-01 → 2010-12-31 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHXS | 0.0030 µg/L | 1/90 | 2024 |
Other contaminants detected
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 1000 µg/L 10% of the EPA limit 10000 µg/L
worst single sample: 2400 µg/L | 804/848 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 1000 µg/L 10% of the EPA limit 10000 µg/L
worst single sample: 2400 µg/L | 355/374 | SYR4 | 2012–2019 |
| Bromoform | 11 µg/L No EPA limit set
worst single sample: 17 µg/L | 158/293 | SYR4 | 2012–2019 |
| TTHM | 11 µg/L 14% of the EPA limit 80 µg/L
worst single sample: 17 µg/L | 158/293 | SYR4 | 2012–2019 |
| Chromium | 2.74 µg/L 2.7% of the EPA limit 100 µg/L
worst single sample: 6.1 µg/L | 133/140 | SYR4 | 2012–2019 |
| Barium | 14.8 µg/L 0.7% of the EPA limit 2000 µg/L
worst single sample: 20 µg/L | 113/139 | SYR4 | 2012–2019 |
| Fluoride | 78.2 µg/L 2% of the EPA limit 4000 µg/L
worst single sample: 84 µg/L | 79/417 | SYR4 | 2012–2019 |
| Copper | 31.365 µg/L 2.4% of the EPA limit 1300 µg/L
worst single sample: 180 µg/L | 71/140 | SYR4 | 2012–2019 |
| Chlordane | 0.5050 µg/L 25% of the EPA limit 2 µg/L
worst single sample: 0.6000 µg/L | 71/387 | SYR4 | 2012–2019 |
| Heptachlor Epoxide | 0.0278 µg/L 14% of the EPA limit 0.2000 µg/L
worst single sample: 0.0280 µg/L | 26/489 | SYR4 | 2012–2019 |
| Dibromochloromethane | 1.185 µg/L No EPA limit set
worst single sample: 1.6 µg/L | 24/292 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 13/13 | LCR | 2018 |
| Gross Beta Particle Activity | 5.28 pCi/L No EPA limit set
worst single sample: 5.4 pCi/L | 9/96 | SYR4 | 2012–2019 |
| Lead | 1.876 µg/L 13% of the EPA limit 15 µg/L
worst single sample: 2.5 µg/L | 9/141 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 1.43 µg/L No EPA limit set
worst single sample: 1.5 µg/L | 8/166 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 4.14 pCi/L 28% of the EPA limit 15 pCi/L
worst single sample: 5.4 pCi/L | 7/96 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 1.27 µg/L No EPA limit set
worst single sample: 1.3 µg/L | 4/166 | SYR4 | 2012–2019 |
| Arsenic | 1.73 µg/L 17% of the EPA limit 10 µg/L
worst single sample: 1.8 µg/L | 3/141 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 3.65 µg/L 61% of the EPA limit 6 µg/L
worst single sample: 3.8 µg/L | 3/461 | SYR4 | 2012–2019 |
| Selenium | 7.915 µg/L 16% of the EPA limit 50 µg/L
worst single sample: 8 µg/L | 2/140 | SYR4 | 2012–2019 |
| Antimony, Total | 1.5 µg/L 25% of the EPA limit 6 µg/L | 1/139 | SYR4 | 2012–2019 |
| Combined Uranium | 2.086 µg/L 7% of the EPA limit 30 µg/L | 1/96 | SYR4 | 2012–2019 |
91 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChloroformCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Hnl-Windward-Pearl Harbor
Is Hnl-Windward-Pearl Harbor tap water safe to drink?
EPA monitoring detected 23 contaminants in Hnl-Windward-Pearl Harbor's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Hnl-Windward-Pearl Harbor's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Bromoform, TTHM, Chromium, and others. The full list with the level and data source for each is above.
How many people does Hnl-Windward-Pearl Harbor serve?
Hnl-Windward-Pearl Harbor reports serving 631,389 people in Hawaii, per its EPA record.
Has Hnl-Windward-Pearl Harbor had any water quality violations?
The EPA has 125 violations on file for Hnl-Windward-Pearl Harbor, of which 3 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.