Is Millersburg Water Auth Tap Water Safe? Quality Report

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

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

216

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	1992-01-01 → 1994-07-07
MCL	Health-based	Archived	1988-06-25 → 1989-06-24
MR	Monitoring	Archived	2026-01-01 → 2026-03-31
MR	Monitoring	Archived	2026-01-01 → 2026-03-31
MR	Monitoring	Resolved	2023-01-01 → 2023-12-31
MR	Monitoring	Resolved	2023-01-01 → 2023-12-31
MR	Monitoring	Resolved	2023-01-01 → 2023-12-31
MR	Monitoring	Resolved	2023-01-01 → 2023-12-31
MR	Monitoring	Resolved	2023-01-01 → 2023-12-31
MR	Monitoring	Resolved	2023-01-01 → 2023-12-31

PFAS detected

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

Contaminant	Max	Detection rate	Period
PFOS	0.0100 µg/L	4/6	2023
PFHXS	0.0035 µg/L	2/6	2023
PFBS	0.0032 µg/L	1/6	2023
PFOA	0.0045 µg/L	1/6	2023

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	815 µg/L 63% of the EPA limit 1300 µg/L worst single sample: 900 µg/L	63/63	SYR4	2013–2019
Nitrate	2827.5 µg/L 28% of the EPA limit 10000 µg/L worst single sample: 3510 µg/L	36/38	SYR4	2012–2019
Bromodichloromethane	9.625 µg/L No EPA limit set worst single sample: 10.9 µg/L	16/16	SYR4	2012–2019
Chloroform	24.075 µg/L No EPA limit set worst single sample: 29.1 µg/L	16/16	SYR4	2012–2019
Dibromochloromethane	5.095 µg/L No EPA limit set worst single sample: 6.04 µg/L	16/16	SYR4	2012–2019
TTHM	39.85 µg/L 50% of the EPA limit 80 µg/L worst single sample: 41.5 µg/L	16/16	SYR4	2012–2019
Barium	54.8 µg/L 2.7% of the EPA limit 2000 µg/L	13/13	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	12/12	LCR	2025
Lead	6.88 µg/L 46% of the EPA limit 15 µg/L worst single sample: 10 µg/L	9/63	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	4.86 µg/L 8.1% of the EPA limit 60 µg/L worst single sample: 5.1 µg/L	7/16	SYR4	2012–2019
Fluoride	895 µg/L 22% of the EPA limit 4000 µg/L worst single sample: 900 µg/L	6/11	SYR4	2012–2019
Lithium	42.4 µg/L No EPA limit set	6/6	UCMR-5	2023
Bromoform	0.8505 µg/L No EPA limit set worst single sample: 0.8700 µg/L	4/16	SYR4	2012–2019
Di(2-ethylhexyl) Phthalate	5.33 µg/L 89% of the EPA limit 6 µg/L worst single sample: 5.6 µg/L	4/19	SYR4	2012–2019
Arsenic	2.846 µg/L 28% of the EPA limit 10 µg/L worst single sample: 2.9 µg/L	3/13	SYR4	2012–2019
Trichloroacetic Acid	1.733 µg/L No EPA limit set worst single sample: 1.77 µg/L	2/2	SYR4	2019
Dichloroacetic Acid	2.48 µg/L No EPA limit set	1/2	SYR4	2019
Selenium	1.2 µg/L 2.4% of the EPA limit 50 µg/L	1/13	SYR4	2012–2019

86 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, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDibromoacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: Nick McCarron
Phone: 717-692-4711

Frequently asked questions about Millersburg Water Auth

Is Millersburg Water Auth tap water safe to drink?

EPA monitoring detected 22 contaminants in Millersburg 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 Millersburg Water Auth's water?

EPA monitoring detected Copper, Nitrate, Bromodichloromethane, Chloroform, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Millersburg Water Auth serve?

Millersburg Water Auth reports serving 4,600 people in Pennsylvania, per its EPA record.

Has Millersburg Water Auth had any water quality violations?

The EPA has 216 violations on file for Millersburg Water Auth, of which 2 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.