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Tap water quality report

Wahiawa

EPA monitoring tested this supplier for 114 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

114
contaminants tested
12
detected
23,348
people served
0
health-based violations
Hawaii rankingsLead in HawaiiPFAS in Hawaii
Water source
Ground water
Ownership
Local government
Counties served
Honolulu

Compliance record

No violations on file. The EPA has no formal drinking-water violations recorded for this supplier.

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
2000 µg/L 20%
of the EPA limit 10000 µg/L
 40/40 SYR4 2012–2019
Fluoride
100 µg/L 2.5%
of the EPA limit 4000 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
1.8 µg/L
No EPA limit set
 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
1.4 µg/L 28%
of the EPA limit 5 µg/L
 12/21 SYR4 2012–2019
Copper
210 µg/L 16%
of the EPA limit 1300 µg/L
 10/10 SYR4 2014–2019
Barium
3.9 µg/L 0.2%
of the EPA limit 2000 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
0.8500 µg/L 5.7%
of the EPA limit 15 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
0.5300 µg/L
No EPA limit set
 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

Contact
KAWATA, ERWIN
Phone
808-748-5080
Email
ekawata@hbws.org

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.