Is Londonderry Twp Water Sys Tap Water Safe? Quality Report

Water source: GWP
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

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Archived	1992-12-01 → 1992-12-31
MCL	Health-based	Archived	1992-12-01 → 1992-12-31
MCL	Health-based	Archived	1992-12-01 → 1992-12-31
MCL	Health-based	Archived	1992-12-01 → 1992-12-31
MR	Monitoring	Resolved	2014-07-01 → 2014-07-31
MR	Monitoring	Resolved	2014-07-01 → 2014-07-31
MR	Monitoring	Resolved	2014-07-01 → 2014-07-31
MR	Monitoring	Resolved	2014-07-01 → 2014-07-31
MR	Monitoring	Resolved	2014-07-01 → 2014-07-31
MR	Monitoring	Resolved	2014-07-01 → 2014-07-31

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	372.5 µg/L 29% of the EPA limit 1300 µg/L worst single sample: 410 µg/L	16/16	SYR4	2013–2019
Lead	3.28 µg/L 22% of the EPA limit 15 µg/L worst single sample: 3.4 µg/L	7/16	SYR4	2013–2019
Bromodichloromethane	6.125 µg/L No EPA limit set worst single sample: 6.2 µg/L	4/4	SYR4	2012–2019
Chloroform	6.07 µg/L No EPA limit set worst single sample: 6.1 µg/L	4/4	SYR4	2012–2019
Dibromochloromethane	4.64 µg/L No EPA limit set worst single sample: 4.7 µg/L	4/4	SYR4	2012–2019
TTHM	17.17 µg/L 21% of the EPA limit 80 µg/L worst single sample: 17.2 µg/L	4/4	SYR4	2012–2019
Bromoform	1.84 µg/L No EPA limit set worst single sample: 1.9 µg/L	3/4	SYR4	2012–2019
Lead	0.0050 mg/L 33% of the EPA limit 0.0150 mg/L	3/3	LCR	1996
Total Haloacetic Acids (HAA5)	1.975 µg/L 3.3% of the EPA limit 60 µg/L worst single sample: 2 µg/L	2/3	SYR4	2012–2019
Dibromoacetic Acid	1.4 µg/L No EPA limit set	1/1	SYR4	2019
Dichloroacetic Acid	2 µg/L No EPA limit set	1/1	SYR4	2019

3 contaminants tested, none detected

Monobromoacetic AcidMonochloroacetic AcidTrichloroacetic Acid

Utility contact

Contact: Andy Brandt
Phone: 717-944-9440

Frequently asked questions about Londonderry Twp Water Sys

Is Londonderry Twp Water Sys tap water safe to drink?

EPA monitoring detected 11 contaminants in Londonderry 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 Londonderry Twp Water Sys's water?

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

How many people does Londonderry Twp Water Sys serve?

Londonderry Twp Water Sys reports serving 36 people in Pennsylvania, per its EPA record.

Has Londonderry Twp Water Sys had any water quality violations?

The EPA has 56 violations on file for Londonderry Twp Water Sys, of which 4 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.