Community Water System · PWS PA7220037
Williamstown Boro Auth
Operator location Williamstown, Pennsylvania - 0% of 325 violations are health-based (lower-third health share (≤ 1%)); surface water source; 2,390 served per SDWIS.
- 2,390
- People served (this PWS)
- 325
- EPA violations (this PWS)
- 0
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Williamstown Boro Auth standing, high SDWIS violation third
0% of 325 recorded violations are health-based - lower-third health share (≤ 1%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 0% is lower-third health share (≤ 1%). Population rank #12,311 of 29,740 among systems serving 500+.
The verdict
Williamstown Boro Auth sits in the upper third of the sitemap cohort by violation count (325), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 2,390 (mid served population (≤ 3,309)). Health-based share is only 0% - almost all of this trail is monitoring or reporting. No UCMR5 PFAS test appears for this system in this extract.
- #12,311 of 29,740
- Population · /systems
- #473 of 1,340
- Population · PA
- 325
- Total EPA violations on record
- 0%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 926
- County
- Dauphin
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 286
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | MR | 40 | 2022 |
| Chlorine | MR | 27 | 2022 |
| Interim Enhanced Surface Water Treatment Rule | MR | 20 | 2014 |
| TTHM | MR | 17 | 2023 |
| Total Haloacetic Acids (HAA5) | MR | 17 | 2023 |
| Coliform (TCR) | MR | 12 | 2007 |
| CARBON, TOTAL | MR | 11 | 2025 |
| Public Notice | Other | 10 | 2007 |
| Nitrate | MR | 10 | 2007 |
| Consumer Confidence Rule | Other | 9 | 2007 |
| Arsenic | MR | 9 | 2007 |
| Styrene | MR | 7 | 2007 |
| Revised Total Coliform Rule | MON | 6 | 2023 |
| DICHLOROMETHANE | MR | 5 | 2007 |
| Barium | MR | 5 | 1993 |
| Chromium | MR | 5 | 1993 |
| Fluoride | MR | 5 | 1993 |
| Mercury | MR | 5 | 1993 |
| Selenium | MR | 5 | 1993 |
| Cadmium | MR | 5 | 1993 |
| cis-1,2-Dichloroethylene | MR | 4 | 2007 |
| Xylenes, Total | MR | 4 | 2007 |
| o-Dichlorobenzene | MR | 4 | 2007 |
| p-Dichlorobenzene | MR | 4 | 2007 |
| trans-1,2-Dichloroethylene | MR | 4 | 2007 |
| 1,1,1-Trichloroethane | MR | 4 | 2007 |
| Carbon tetrachloride | MR | 4 | 2007 |
| 1,1,2-Trichloroethane | MR | 4 | 2007 |
| Toluene | MR | 4 | 2007 |
| Ethylbenzene | MR | 4 | 2007 |
Violation Count vs. the National Corpus
Williamstown Boro Auth has 325 recorded EPA violations, 92% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 8% carry more. 0% of this system's own violations are health-based (0 of 325), and it ranks #12,311 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
325 Higher than most more violations than 92% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Williamstown Boro Auth
0 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for PA7220037.
Sources: EPA SDWIS · Pennsylvania DEP, Bureau of Safe Drinking Water
Nationwide peers
325 violations · 2,390 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Williamstown Boro Auth
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Pennsylvania compares on the same EPA violation measures. Pennsylvania systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.