Public water system · PA7220055
ActiveLondonderry Twp Water Sys
At a glance
Londonderry Twp Water Sys (PWSID PA7220055) is an active community water system in Dauphin County, Pennsylvania. It reports serving 36 people through 14 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2014.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
36
Service connections
14
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Londonderry Twp Water Sys compare with other water systems in Dauphin County?
By EPA's size categories, Londonderry Twp Water Sys is a very small system (500 people or fewer). Dauphin County has 134 active public water systems. Its population served is well below the county average of 2,176 people per system, and accounts for less than 0.1% of the 291,539 people reported by systems filed under the county. Across Pennsylvania, the 7,217 active systems average 1,741 people each. Nationally, the average active community water system reports serving 6,703 people, so Londonderry Twp Water Sys is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Pennsylvania has 1,762 active community water systems, 24% of the state's 7,217 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 54 Pennsylvania systems (0.7%) list purchased groundwater as their primary source.
Who owns and regulates Londonderry Twp Water Sys?
EPA lists Londonderry Twp Water Sys as owned by a local government. The PA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 21 of the 134 active systems in Dauphin County (16%) are also owned by a local government.
Does Londonderry Twp Water Sys have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2014. The violations listed here began between July 2005 and July 2014. By type: 10 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2014-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-06-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2009-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2006-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2006-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2006-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2005-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Londonderry Twp Water Sys: frequently asked questions
Who runs Londonderry Twp Water Sys?
Londonderry Twp Water Sys (PWSID PA7220055) is a community water system owned by a local government. It is regulated by the PA state drinking water program.
How many people does Londonderry Twp Water Sys serve?
Londonderry Twp Water Sys reports serving 36 people through 14 service connections in Dauphin County, Pennsylvania.
Where does Londonderry Twp Water Sys get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Londonderry Twp Water Sys have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2014. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Londonderry Twp Water Sys' water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2014. For current results, consult the system's annual water quality report, EPA ECHO, or the PA state drinking water program.
Where can I find Londonderry Twp Water Sys' water quality report?
As a community water system, Londonderry Twp Water Sys must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Dauphin County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Veolia Water | Dauphin | 110,000 | Community | Surface water |
| Capital Region Water | Dauphin | 66,540 | Community | Surface water |
| Pa Amer Water Co | Dauphin | 50,200 | Community | Surface water |
| Veolia Middletown | Dauphin | 9,600 | Community | Groundwater |
| Pa American Water Steelton | Dauphin | 6,428 | Community | Surface water |
| Penn National Gaming | Dauphin | 6,000 | Non-transient non-community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Londonderry Twp Water Sys, PWSID PA7220055, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/londonderry-twp-water-sys-pa7220055 (data as of October 1, 2026).