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 | 2000 µg/L 20% of the EPA limit 10000 µg/L | 40/40 | SYR4 | 2012–2019 |
| Fluoride | 97.85 µg/L 2.4% of the EPA limit 4000 µg/L
worst single sample: 100 µg/L | 22/22 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 2000 µg/L 20% of the EPA limit 10000 µg/L | 19/19 | SYR4 | 2012–2019 |
| Bromoform | 1.65 µg/L No EPA limit set
worst single sample: 1.8 µg/L | 16/31 | SYR4 | 2012–2019 |
| TTHM | 1.9 µg/L 2.4% of the EPA limit 80 µg/L | 16/31 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 1.235 µg/L 25% of the EPA limit 5 µg/L
worst single sample: 1.4 µg/L | 12/21 | SYR4 | 2012–2019 |
| Copper | 183 µg/L 14% of the EPA limit 1300 µg/L
worst single sample: 210 µg/L | 10/10 | SYR4 | 2014–2019 |
| Barium | 3.82 µg/L 0.2% of the EPA limit 2000 µg/L
worst single sample: 3.9 µg/L | 9/10 | SYR4 | 2014–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 9/9 | LCR | 2018 |
| Lead | 0.8350 µg/L 5.6% of the EPA limit 15 µg/L
worst single sample: 0.8500 µg/L | 4/10 | SYR4 | 2014–2019 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0120 µg/L 6% of the EPA limit 0.2000 µg/L | 3/24 | SYR4 | 2012–2019 |
| Dibromochloromethane | 0.5290 µg/L No EPA limit set
worst single sample: 0.5300 µg/L | 2/31 | SYR4 | 2012–2019 |
102 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, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, 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 Wahiawa
Is Wahiawa tap water safe to drink?
EPA monitoring detected 12 contaminants in Wahiawa'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 Wahiawa's water?
EPA monitoring detected Nitrate, Fluoride, Nitrate-Nitrite, Bromoform, TTHM, and others. The full list with the level and data source for each is above.
How many people does Wahiawa serve?
Wahiawa reports serving 23,348 people in Hawaii, per its EPA record.
Has Wahiawa had any water quality violations?
The EPA has no formal drinking-water violations on file for Wahiawa.
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.