Chlorine (MRDL) violations in Pennsylvania
429 active public water systems in Pennsylvania had a Chlorine (MRDL) violation in the past three years, 66 of them in the latest quarter of EPA's data. What Chlorine (MRDL) is and why it matters.
Systems with a Chlorine (MRDL) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Kelleys Rentals Bradford County |
65 | 4 | 1 | |
|
Meshoppen Townhouse Apts Wyoming County |
65 | 4 | 0 | |
|
State Line MHP Franklin County |
65 | 5 | 1 | |
|
Salem Heights Estate Wayne County |
62 | 13 | 4 | |
|
Hidden View Estates Centre County |
57 | 7 | 0 | |
|
Ridgecrest Monroe County |
55 | 7 | 1 | |
|
Dcnr Quehanna Facility Clearfield County |
50 | 5 | 0 | |
|
Harsco Minerals PA Butler County |
47 | 5 | 0 | |
|
Titusville Estates Crawford County |
44 | 4 | 1 | |
|
Mountain View Apartments Berks County |
40 | 2 | 1 | |
|
Whites Ferry Road Apts Wyoming County |
39 | 5 | 0 | |
|
Old Orchard Apts Wyoming County |
38 | 3 | 0 | |
|
Wheatfield Village Pike County |
35 | 10 | 2 | |
|
Winola View Apts Wyoming County |
28 | 3 | 0 | |
|
Beechcrest Properties LLC Luzerne County |
25 | 4 | 1 | |
|
Lerew Red Barn Orchard Adams County |
25 | 4 | 1 | |
|
Greater Johnstown WA Riverside Cambria County |
49,500 | 7 | 0 | |
|
West Cnty Muni Auth-McKeesport Allegheny County |
32,644 | 3 | 0 | |
|
Pittsburgh Intl Airport Allegheny County |
26,915 | 5 | 0 | |
|
Carlisle Water Trmt Plt Cumberland County |
26,000 | 3 | 0 | |
|
Ambridge Water Auth Beaver County |
19,500 | 6 | 0 | |
|
Bradford City Water Authority McKean County |
18,500 | 6 | 1 | |
|
Phoenixville Water Dept Chester County |
16,599 | 8 | 0 | |
|
Highridge Water Auth Westmoreland County |
16,000 | 5 | 0 | |
|
Warwick Twp Water & Sewer Auth Bucks County |
14,699 | 3 | 1 | |
|
Swt Main System Lehigh County |
14,500 | 4 | 0 | |
|
Clearfield Municipal Auth Clearfield County |
14,000 | 2 | 0 | |
|
Dallastown Yoe Water Auth York County |
12,300 | 3 | 0 | |
|
South Middleton Twp Water Auth Cumberland County |
11,695 | 6 | 0 | |
|
Humboldt Industrial Park Luzerne County |
11,243 | 5 | 0 | |
|
Municipal Authority Sunbury Northumberland County |
11,043 | 6 | 1 | |
|
West Manchester Twp Auth York County |
9,960 | 3 | 0 | |
|
Suburban Lock Haven Water Auth Clinton County |
9,700 | 4 | 0 | |
|
Windber Area Auth Somerset County |
9,463 | 6 | 0 | |
|
Merck and CO INC Montgomery County |
8,550 | 2 | 0 | |
|
New Holland Borough Lancaster County |
8,490 | 2 | 0 | |
|
City of Lock Haven Water Dept Clinton County |
8,450 | 6 | 1 | |
|
Hemlock Farms (main) Pike County |
8,321 | 8 | 0 | |
|
Millersville Univ Lancaster County |
7,950 | 2 | 0 | |
|
MT Airy Casino & Resort Monroe County |
7,000 | 5 | 2 | |
|
Richland Twp Water Authority Bucks County |
6,800 | 3 | 0 | |
|
Jersey Shore Area Jnt Wat Auth Lycoming County |
6,600 | 7 | 1 | |
|
Kennett Square Mun Water Works Chester County |
6,328 | 9 | 1 | |
|
Belle Vernon Boro Muni Auth Fayette County |
6,000 | 3 | 1 | |
|
Albion Borough Erie County |
5,842 | 7 | 0 | |
|
Beaver Boro Muni Auth Beaver County |
5,799 | 9 | 0 | |
|
Hilltown Twp Water&sewer Auth Bucks County |
5,770 | 5 | 0 | |
|
Selinsgrove Muni Auth Snyder County |
5,584 | 5 | 0 | |
|
Birdsboro Muni Water Auth Berks County |
5,353 | 5 | 0 | |
|
Tarentum Boro Water Dept Allegheny County |
4,927 | 6 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Chlorine (MRDL), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Chlorine (MRDL) alone.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Pennsylvania records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.