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 |
|---|---|---|---|---|
|
Crestview Village MHP Dauphin County |
223 | 9 | 0 | |
|
Shippingport Boro Water Sys Beaver County |
222 | 1 | 0 | |
|
Mountain Springs MHP Berks County |
215 | 3 | 0 | |
|
Bethany Childrens Home Berks County |
200 | 1 | 0 | |
|
Brookwood Countryside Bedford County |
200 | 3 | 0 | |
|
Canal Mobile Home Park Wayne County |
200 | 3 | 0 | |
|
Creekview MHP Chester County |
200 | 8 | 0 | |
|
Forest Brook MHP Beaver County |
200 | 7 | 0 | |
|
Limestone Twp Mun Auth Union County |
200 | 5 | 0 | |
|
Martins Creeks Ses Northampton County |
200 | 1 | 0 | |
|
Sparrow Pond Camp Ground Erie County |
200 | 3 | 0 | |
|
Tioga Mobile Home Community Tioga County |
200 | 5 | 2 | |
|
Pinecrest Village MHP Lycoming County |
195 | 12 | 3 | |
|
Apx Enclosures INC Franklin County |
190 | 1 | 0 | |
|
Mountain Manor Community Monroe County |
187 | 4 | 1 | |
|
Godshalls Quality Meats INC Montgomery County |
175 | 4 | 0 | |
|
Plumstead Christian Lower Schl Bucks County |
175 | 4 | 0 | |
|
Bernies Mobile Home Park Butler County |
170 | 8 | 1 | |
|
Happy Acres Development Lackawanna County |
168 | 12 | 2 | |
|
Gateway Restaurant Bedford County |
165 | 3 | 0 | |
|
Henrietta Mutual Water Assn Blair County |
165 | 1 | 0 | |
|
Chestnut Ridge MHP Carbon County |
152 | 2 | 0 | |
|
Chicora Medical Center Butler County |
150 | 4 | 0 | |
|
Country Crest MHP Luzerne County |
150 | 7 | 1 | |
|
Greenville MHP Mercer County |
150 | 3 | 1 | |
|
Joe Jurgielewicz & Son Ltd Berks County |
150 | 2 | 0 | |
|
Knob Vue Estates Beaver County |
150 | 5 | 0 | |
|
Lebanon Valley Christ School Berks County |
150 | 1 | 0 | |
|
Transitions Health Care Perry County |
150 | 1 | 0 | |
|
Vali-View Mobile Home Park Lycoming County |
150 | 11 | 1 | |
|
Messiah Evan Luth CH Perry County |
145 | 3 | 0 | |
|
Hazel Hurst Water Company McKean County |
140 | 7 | 1 | |
|
Masons Mobile City Warren County |
140 | 5 | 2 | |
|
Monument Water Authority Centre County |
140 | 11 | 0 | |
|
Deann Village MHP Dauphin County |
135 | 10 | 0 | |
|
Big Bass Lake Water Assoc. Wayne County |
130 | 10 | 3 | |
|
Bucks Run Apartments Bucks County |
130 | 4 | 0 | |
|
Oak Grove Park MHP Montgomery County |
130 | 3 | 0 | |
|
Somers Lane MHP Tioga County |
130 | 5 | 1 | |
|
Composidie INC Westmoreland County |
129 | 4 | 1 | |
|
Brookside Commons Crawford County |
125 | 10 | 0 | |
|
Himalayan Institute Wayne County |
124 | 7 | 0 | |
|
Aqua PA Water CO Pine Beach Wayne County |
122 | 2 | 0 | |
|
Edgewood Mobile Home Park Lackawanna County |
117 | 6 | 2 | |
|
White Sand Springs Pike County |
115 | 2 | 0 | |
|
Blue Mountain View Carbon County |
114 | 4 | 1 | |
|
Aqua PA Fieldcrest Luzerne County |
112 | 1 | 0 | |
|
Green Mountain Estates Monroe County |
108 | 5 | 1 | |
|
Alphabet Garden Childcare Bucks County |
100 | 6 | 0 | |
|
Bucknell View MHP Northumberland County |
100 | 2 | 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.