Is Dover Twp Water Sys Tap Water Safe? Quality Report

Water source: SWP
Ownership: Local government
Counties served: York

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

1,446

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2019-01-01 → 2019-01-31
TT	Health-based	Resolved	2019-01-01 → 2019-01-31
TT	Health-based	Resolved	2011-04-01 → 2011-04-30
TT	Health-based	Resolved	2011-04-01 → 2011-04-30
TT	Health-based	Resolved	2011-04-01 → 2011-04-30
MCL	Health-based	Resolved	2008-01-01 → 2008-03-31
MCL	Health-based	Resolved	2008-01-01 → 2008-03-31
MCL	Health-based	Resolved	2008-01-01 → 2008-03-31
MCL	Health-based	Resolved	2008-01-01 → 2008-03-31
MCL	Health-based	Resolved	2007-10-01 → 2007-10-31

PFAS detected

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

Contaminant	Max	Detection rate	Period
PFBS	0.0057 µg/L	11/20	2025
PFOS	0.0096 µg/L	11/20	2025
PFOA	0.0059 µg/L	9/20	2025
Pfpea	0.0106 µg/L	7/20	2025
Pfhxa	0.0064 µg/L	2/20	2025
Pfhpa	0.0035 µg/L	1/20	2025

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	4324.5 µg/L 43% of the EPA limit 10000 µg/L worst single sample: 9200 µg/L	188/188	SYR4	2012–2019
Chloroform	30 µg/L No EPA limit set worst single sample: 40.8 µg/L	140/154	SYR4	2012–2019
Bromodichloromethane	8.26 µg/L No EPA limit set worst single sample: 9 µg/L	138/142	SYR4	2012–2019
Dibromochloromethane	2.515 µg/L No EPA limit set worst single sample: 4.8 µg/L	138/145	SYR4	2012–2019
TTHM	39.52 µg/L 49% of the EPA limit 80 µg/L worst single sample: 51.5 µg/L	128/130	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	30 µg/L 50% of the EPA limit 60 µg/L worst single sample: 50 µg/L	110/130	SYR4	2012–2019
Copper	962.5 µg/L 74% of the EPA limit 1300 µg/L worst single sample: 1260 µg/L	72/93	SYR4	2013–2019
Dichloroacetic Acid	19.2 µg/L No EPA limit set worst single sample: 32 µg/L	57/64	SYR4	2016–2019
Trichloroacetic Acid	14 µg/L No EPA limit set worst single sample: 18 µg/L	45/64	SYR4	2016–2019
Lead	0.0049 mg/L 33% of the EPA limit 0.0150 mg/L	17/17	LCR	2025
Lithium	58.8 µg/L No EPA limit set	15/20	UCMR-5	2025
Bromoform	0.8900 µg/L No EPA limit set worst single sample: 1 µg/L	12/134	SYR4	2012–2019
Lead	21 µg/L 140% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 22 µg/L	11/93	SYR4	2013–2019
Combined Uranium	11.616 µg/L 39% of the EPA limit 30 µg/L worst single sample: 12.7782 µg/L	9/9	SYR4	2012–2017
Trichloroethylene	1.78 µg/L 36% of the EPA limit 5 µg/L worst single sample: 1.8 µg/L	5/40	SYR4	2012–2019
Dibromoacetic Acid	1.85 µg/L No EPA limit set worst single sample: 2 µg/L	4/64	SYR4	2016–2019
Monochloroacetic Acid	3 µg/L No EPA limit set	4/64	SYR4	2016–2019
Carbon Tetrachloride	0.7900 µg/L 16% of the EPA limit 5 µg/L worst single sample: 0.8000 µg/L	3/40	SYR4	2012–2019
Fluoride	236 µg/L 5.9% of the EPA limit 4000 µg/L worst single sample: 240 µg/L	3/25	SYR4	2012–2018

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-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpsPFHXSPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: LAUREL OSWALT
Phone: 717-292-3634

Frequently asked questions about Dover Twp Water Sys

Is Dover Twp Water Sys tap water safe to drink?

EPA monitoring detected 25 contaminants in Dover Twp Water Sys'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 Dover Twp Water Sys's water?

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

How many people does Dover Twp Water Sys serve?

Dover Twp Water Sys reports serving 21,097 people in Pennsylvania, per its EPA record.

Has Dover Twp Water Sys had any water quality violations?

The EPA has 1446 violations on file for Dover Twp Water Sys, of which 29 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.