Twin Rocks Water Quality
Pennsylvania
According to EPA SDWIS, Twin Rocks, Pennsylvania is served by 1 community water system covering about 1,650 people. The same extract lists 36 health-based violation records, most recently coded 0200 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Twin Rocks, Pennsylvania is delivered through 1 EPA-regulated community water system serving an estimated 1,650 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 36 violation records across the 1 active community system shown here. Monitoring and reporting records are not present in the extract. The records carry 3 distinct EPA contaminant codes: Surface Water Treatment Rule, Total Haloacetic Acids (HAA5), TTHM.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Pennsylvania drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| BLACKLICK VALLEY MUNI AUTH | 1,650 | 36 | Health |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| BLACKLICK VALLEY MUNI AUTH | Surface Water Treatment Rule | 2025-08-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-10-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-10-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-10-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-10-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-10-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-07-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-07-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-07-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-07-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-07-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-04-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-04-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-04-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-04-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-04-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-04-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-01-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-01-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-01-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-01-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2020-01-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2019-10-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2019-10-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2019-10-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2019-10-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2016-04-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2016-04-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2016-01-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2016-01-01 |
| BLACKLICK VALLEY MUNI AUTH | Total Haloacetic Acids (HAA5) | 2015-10-01 |
| BLACKLICK VALLEY MUNI AUTH | TTHM | 2009-07-01 |
| BLACKLICK VALLEY MUNI AUTH | TTHM | 2008-01-01 |
| BLACKLICK VALLEY MUNI AUTH | TTHM | 2005-07-01 |
| BLACKLICK VALLEY MUNI AUTH | TTHM | 2005-04-01 |
| BLACKLICK VALLEY MUNI AUTH | TTHM | 2005-01-01 |
What are Twin Rocks's health-based records for?
Twin Rocks's health-based violation records carry 3 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Total Haloacetic Acids (HAA5) | 30 | 1 |
| Tthm | 5 | 1 |
| Surface Water Treatment Rule | 1 | 1 |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Twin Rocks, Pennsylvania? ▼
How many water violations does Twin Rocks have in this EPA extract? ▼
What contaminants were found in Twin Rocks water? ▼
How many water systems serve Twin Rocks? ▼
Where does Twin Rocks get its drinking water? ▼
How does Twin Rocks compare in Pennsylvania?
Of the 769 Pennsylvania places with at least one community water system on file, Twin Rocks ranks #722 by number of systems (1).
Either side of it: Trout Run (1), Troxelville (1), Ulster (1), Ulysses (1)
About This Data
Figures here are the current EPA SDWIS extract joined to the 1 community water system whose service area lists Twin Rocks, ranked against the 769 Pennsylvania places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.