TTHM (Total Trihalomethanes) violations in Pennsylvania
535 active public water systems in Pennsylvania had a TTHM (Total Trihalomethanes) violation in the past three years, 39 of them in the latest quarter of EPA's data. What TTHM (Total Trihalomethanes) is and why it matters.
Systems with a TTHM (Total Trihalomethanes) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Stonebridge Gardens MHP Somerset County |
75 | 3 | 0 | |
|
Watrous Water Association Tioga County |
75 | 7 | 1 | |
|
Rustic Acres MHP Pike County |
73 | 6 | 0 | |
|
N Annville MHP Lebanon County |
72 | 4 | 1 | |
|
Southside Northside Water Assn McKean County |
72 | 3 | 0 | |
|
Sunny Crest Home Lancaster County |
71 | 2 | 0 | |
|
Grandview Acres MHP Mercer County |
70 | 10 | 3 | |
|
Maplewood Mobile Home Park Chester County |
70 | 7 | 0 | |
|
Panorama MHP Adams County |
70 | 6 | 0 | |
|
Washington Inn Berks County |
70 | 4 | 0 | |
|
Windsor Mobilehome Park Erie County |
70 | 4 | 0 | |
|
Log Road Village Lackawanna County |
68 | 5 | 1 | |
|
Rodeway Inn Mercer County |
68 | 2 | 0 | |
|
Gluco Lodge Monroe County |
65 | 4 | 0 | |
|
Icmsa Arcadia Indiana County |
65 | 4 | 1 | |
|
Lake RD MHP Menu Mate Mushroom Chester County |
65 | 4 | 0 | |
|
State Line MHP Franklin County |
65 | 5 | 1 | |
|
Delmar Meadows MHC Tioga County |
64 | 4 | 0 | |
|
Lehman Home Park Luzerne County |
63 | 4 | 1 | |
|
Copper Kettle MHP Wyoming County |
62 | 4 | 2 | |
|
HY Vue Acres MHP Butler County |
62 | 10 | 1 | |
|
Salem Heights Estate Wayne County |
62 | 13 | 4 | |
|
D and S Estates Venango County |
61 | 1 | 0 | |
|
Hardwood Estates Crawford County |
61 | 3 | 0 | |
|
Denny Ridge Mobile Home Park Crawford County |
60 | 8 | 0 | |
|
Elderberry MHP Crawford County |
60 | 8 | 0 | |
|
Hidden Valley Mobile Home CT Lycoming County |
60 | 4 | 0 | |
|
Hollister Heights MHC Wayne County |
60 | 2 | 0 | |
|
Little Britain MHP Lancaster County |
60 | 5 | 0 | |
|
Little Creek Estates M H P Beaver County |
60 | 6 | 0 | |
|
Perry Phillips Mobile Homes Chester County |
60 | 3 | 1 | |
|
SK Properties LP Misty Meadows Berks County |
60 | 4 | 1 | |
|
Sunnydale Subdivision Erie County |
60 | 3 | 0 | |
|
Sweet Valley MHC Luzerne County |
60 | 8 | 2 | |
|
Hidden View Estates Centre County |
57 | 7 | 0 | |
|
Jefferson Estates MHP Mercer County |
57 | 5 | 0 | |
|
Lanc CO Sol Wast Mgt Res Recov Lancaster County |
56 | 1 | 0 | |
|
Greystone Country Estates Mercer County |
55 | 2 | 0 | |
|
Lupfers Grove MHP & Cpgrd Perry County |
55 | 3 | 0 | |
|
Ridgeview MHP Chester County |
55 | 3 | 0 | |
|
Deer Run Mobile Home Park Monroe County |
54 | 7 | 2 | |
|
Highland Court Chester County |
54 | 2 | 0 | |
|
Route 322 Mobile Home Park Mercer County |
53 | 4 | 3 | |
|
Glasgow Municipal Water Works Beaver County |
51 | 7 | 2 | |
|
Pennwood Estates MHP Mercer County |
51 | 6 | 0 | |
|
Beaver Run Water Association Carbon County |
50 | 8 | 1 | |
|
Colonial Glenn Estates Beaver County |
50 | 8 | 0 | |
|
D and H Trailer Park Northumberland County |
50 | 2 | 0 | |
|
Exeter Twp SR Ctr & Apt Comple Wyoming County |
50 | 3 | 2 | |
|
Houston Run Community Lancaster County |
50 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved TTHM (Total Trihalomethanes), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not TTHM (Total Trihalomethanes) 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.