Is Williamsport Mun Water Auth Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: Lycoming

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

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Archived	1985-07-01 → 1985-09-30
MR	Monitoring	Resolved	2018-10-01 → 2018-12-31
MR	Monitoring	Resolved	2018-10-01 → 2018-12-31
MR	Monitoring	Resolved	2018-10-01 → 2018-12-31
MR	Monitoring	Resolved	2018-10-01 → 2018-12-31
MR	Monitoring	Resolved	2018-10-01 → 2018-12-31
MR	Monitoring	Resolved	2018-10-01 → 2018-12-31
MR	Monitoring	Resolved	2018-07-01 → 2018-09-30
MR	Monitoring	Resolved	2018-07-01 → 2018-09-30
MR	Monitoring	Resolved	2018-07-01 → 2018-09-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
PFNA	0.0097 µg/L	3/4	2024
PFHXS	0.0036 µg/L	2/4	2024
Pfhxa	0.0035 µg/L	1/4	2024
PFOS	0.0051 µg/L	1/4	2024
Pfpea	0.0041 µg/L	1/4	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
Bromodichloromethane	12.23 µg/L No EPA limit set worst single sample: 19.2 µg/L	235/235	SYR4	2012–2019
Chloroform	48.23 µg/L No EPA limit set worst single sample: 67.3 µg/L	235/235	SYR4	2012–2019
TTHM	56.68 µg/L 71% of the EPA limit 80 µg/L worst single sample: 78.4 µg/L	235/235	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	28.29 µg/L 47% of the EPA limit 60 µg/L worst single sample: 33.4 µg/L	235/235	SYR4	2012–2019
Dibromochloromethane	7.5735 µg/L No EPA limit set worst single sample: 10.4 µg/L	172/235	SYR4	2012–2019
Copper	54.61 µg/L 4.2% of the EPA limit 1300 µg/L worst single sample: 89.2 µg/L	90/90	SYR4	2013–2019
Dichloroacetic Acid	12.815 µg/L No EPA limit set worst single sample: 13.3 µg/L	40/40	SYR4	2018–2019
Trichloroacetic Acid	11.61 µg/L No EPA limit set worst single sample: 12.1 µg/L	40/40	SYR4	2018–2019
Bromoform	1.4 µg/L No EPA limit set worst single sample: 1.5 µg/L	32/235	SYR4	2012–2019
Lead	8.4945 µg/L 57% of the EPA limit 15 µg/L worst single sample: 30.6 µg/L	28/90	SYR4	2013–2019
Nitrate	790 µg/L 7.9% of the EPA limit 10000 µg/L	16/16	SYR4	2012–2019
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L	13/13	LCR	2025
Barium	53.405 µg/L 2.7% of the EPA limit 2000 µg/L worst single sample: 56.8 µg/L	8/8	SYR4	2012–2019
Fluoride	847.5 µg/L 21% of the EPA limit 4000 µg/L worst single sample: 900 µg/L	8/8	SYR4	2012–2019
Chromium	2.392 µg/L 2.4% of the EPA limit 100 µg/L worst single sample: 2.49 µg/L	5/8	SYR4	2012–2019
Dibromoacetic Acid	1.285 µg/L No EPA limit set worst single sample: 1.3 µg/L	4/40	SYR4	2018–2019
Monochloroacetic Acid	1.365 µg/L No EPA limit set worst single sample: 1.37 µg/L	2/40	SYR4	2018–2019
Xylenes, Total	0.5200 µg/L 0% of the EPA limit 10000 µg/L	1/11	SYR4	2012–2019

84 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-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFOAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: MICHAEL MILLER
Phone: 570-323-6140

Frequently asked questions about Williamsport Mun Water Auth

Is Williamsport Mun Water Auth tap water safe to drink?

EPA monitoring detected 23 contaminants in Williamsport Mun Water Auth'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 Williamsport Mun Water Auth's water?

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

How many people does Williamsport Mun Water Auth serve?

Williamsport Mun Water Auth reports serving 51,000 people in Pennsylvania, per its EPA record.

Has Williamsport Mun Water Auth had any water quality violations?

The EPA has 42 violations on file for Williamsport Mun Water Auth, of which 1 is 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.