Is Onslow Wtr and Sewer Authority Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Onslow

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.

health-based violations

234

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2024-10-17
TT	Health-based	Resolved	2024-10-17
MCL	Health-based	Resolved	2013-10-01 → 2013-12-31
MCL	Health-based	Resolved	2013-10-01 → 2013-12-31
MCL	Health-based	Resolved	2013-10-01 → 2013-12-31
MCL	Health-based	Resolved	2013-10-01 → 2013-12-31
MCL	Health-based	Resolved	2013-10-01 → 2013-12-31
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30

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
Copper	611.7 µg/L 47% of the EPA limit 1300 µg/L worst single sample: 881.1 µg/L	261/507	SYR4	2012–2019
TTHM	86.95 µg/L 109% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 130.488 µg/L	202/202	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	40.15 µg/L 67% of the EPA limit 60 µg/L worst single sample: 57.262 µg/L	200/200	SYR4	2012–2019
Bromodichloromethane	17 µg/L No EPA limit set worst single sample: 26 µg/L	186/186	SYR4	2012–2019
Chloroform	69.725 µg/L No EPA limit set worst single sample: 106.121 µg/L	186/186	SYR4	2012–2019
Dichloroacetic Acid	20.6803 µg/L No EPA limit set worst single sample: 32 µg/L	185/186	SYR4	2012–2019
Trichloroacetic Acid	18.84 µg/L No EPA limit set worst single sample: 80 µg/L	185/186	SYR4	2012–2019
Dibromochloromethane	7.5 µg/L No EPA limit set worst single sample: 11 µg/L	171/186	SYR4	2012–2019
Lead	114.7 µg/L 765% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 417.4 µg/L	61/507	SYR4	2012–2019
Fluoride	2032 µg/L 51% of the EPA limit 4000 µg/L worst single sample: 3500 µg/L	49/49	SYR4	2013–2019
Monobromoacetic Acid	2 µg/L No EPA limit set worst single sample: 17 µg/L	42/186	SYR4	2012–2019
Monochloroacetic Acid	3 µg/L No EPA limit set worst single sample: 4 µg/L	40/186	SYR4	2012–2019
Bromoform	5 µg/L No EPA limit set worst single sample: 7 µg/L	29/186	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	29/29	LCR	2025
Dibromoacetic Acid	2 µg/L No EPA limit set	20/186	SYR4	2012–2019
Combined Radium (-226 And -228)	1.99 pCi/L 40% of the EPA limit 5 pCi/L worst single sample: 2.8 pCi/L	19/41	SYR4	2012–2019
Lithium	29.5 µg/L No EPA limit set	7/10	UCMR-5	2023
Chromium	28.6 µg/L 29% of the EPA limit 100 µg/L worst single sample: 30 µg/L	5/49	SYR4	2013–2019
Gross Beta Particle Activity	9.325 pCi/L No EPA limit set worst single sample: 9.4 pCi/L	4/7	SYR4	2012–2016
Gross Alpha, Excl. Radon And U	3.495 pCi/L 23% of the EPA limit 15 pCi/L worst single sample: 3.5 pCi/L	2/24	SYR4	2012–2016
Nitrate	1218.7 µg/L 12% of the EPA limit 10000 µg/L	2/252	SYR4	2012–2019
Nitrate-Nitrite	1165.28 µg/L 12% of the EPA limit 10000 µg/L worst single sample: 1218.7 µg/L	2/102	SYR4	2012–2019
Combined Uranium	1.49 µg/L 5% of the EPA limit 30 µg/L	1/41	SYR4	2012–2019
Nitrite	150.3 µg/L 15% of the EPA limit 1000 µg/L	1/102	SYR4	2012–2019

85 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: BROWN, SETH
Phone: 910-937-7520
Email: [email protected]

Frequently asked questions about Onslow Wtr and Sewer Authority

Is Onslow Wtr and Sewer Authority tap water safe to drink?

EPA monitoring detected 24 contaminants in Onslow Wtr and Sewer Authority'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 Onslow Wtr and Sewer Authority's water?

EPA monitoring detected Copper, TTHM, Total Haloacetic Acids (HAA5), Bromodichloromethane, Chloroform, and others. The full list with the level and data source for each is above.

How many people does Onslow Wtr and Sewer Authority serve?

Onslow Wtr and Sewer Authority reports serving 156,755 people in North Carolina, per its EPA record.

Has Onslow Wtr and Sewer Authority had any water quality violations?

The EPA has 234 violations on file for Onslow Wtr and Sewer Authority, of which 21 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.