Compliance record
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 | 3885 µg/L 39% of the EPA limit 10000 µg/L
worst single sample: 3900 µg/L | 22/22 | SYR4 | 2012–2019 |
| Fluoride | 155 µg/L 3.9% of the EPA limit 4000 µg/L
worst single sample: 160 µg/L | 11/11 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 3765 µg/L 38% of the EPA limit 10000 µg/L
worst single sample: 3900 µg/L | 10/10 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 9/9 | LCR | 2018 |
| Bromoform | 3.385 µg/L No EPA limit set
worst single sample: 3.7 µg/L | 8/24 | SYR4 | 2012–2019 |
| TTHM | 3.71 µg/L 4.6% of the EPA limit 80 µg/L
worst single sample: 4.2 µg/L | 8/24 | SYR4 | 2012–2019 |
| Chromium | 2.24 µg/L 2.2% of the EPA limit 100 µg/L
worst single sample: 2.3 µg/L | 5/5 | SYR4 | 2014–2017 |
| Barium | 2.84 µg/L 0.1% of the EPA limit 2000 µg/L
worst single sample: 2.9 µg/L | 4/5 | SYR4 | 2014–2017 |
| Trichloroethylene | 0.8105 µg/L 16% of the EPA limit 5 µg/L
worst single sample: 0.8300 µg/L | 4/12 | SYR4 | 2012–2019 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0240 µg/L 12% of the EPA limit 0.2000 µg/L | 3/35 | SYR4 | 2012–2019 |
| Copper | 17.95 µg/L 1.4% of the EPA limit 1300 µg/L
worst single sample: 18 µg/L | 2/5 | SYR4 | 2014–2017 |
| Arsenic | 1.4 µg/L 14% of the EPA limit 10 µg/L | 1/5 | SYR4 | 2014–2017 |
| Dibromochloromethane | 0.5200 µg/L No EPA limit set | 1/24 | SYR4 | 2012–2019 |
| Selenium | 6.7 µg/L 13% of the EPA limit 50 µg/L | 1/5 | SYR4 | 2014–2017 |
100 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Waialua-Haleiwa
Is Waialua-Haleiwa tap water safe to drink?
EPA monitoring detected 14 contaminants in Waialua-Haleiwa'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 Waialua-Haleiwa's water?
EPA monitoring detected Nitrate, Fluoride, Nitrate-Nitrite, Lead, Bromoform, and others. The full list with the level and data source for each is above.
How many people does Waialua-Haleiwa serve?
Waialua-Haleiwa reports serving 9,996 people in Hawaii, per its EPA record.
Has Waialua-Haleiwa had any water quality violations?
The EPA has no formal drinking-water violations on file for Waialua-Haleiwa.
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.