Community Water System · PWS PA7500019
Duncannon Muni Water
Operator location Duncannon, Pennsylvania - upper-third violation load (> 74 violations) with 746 EPA violations; groundwater source; 2,000 served (PWS-level, not municipal population).
- 2,000
- People served (this PWS)
- 746
- EPA violations (this PWS)
- 14
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Duncannon Muni Water standing, high SDWIS violation third
746 EPA SDWIS violations on record - upper-third violation load (> 74 violations). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 2% is middle-third health share (≤ 23%). Population rank #13,666 of 29,740 among systems serving 500+.
The verdict
Duncannon Muni Water sits in the upper third of the sitemap cohort by violation count (746), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 2,000 (mid served population (≤ 3,309)). Health-based share is 2% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #13,666 of 29,740
- Population · /systems
- #530 of 1,340
- Population · PA
- 746
- Total EPA violations on record
- 2%
- 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
- 1,137
- County
- Perry
- School/Daycare
- No
- MCL Violations
- 5
- Monitoring Violations
- 719
- Treatment Tech Violations
- 9
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 26 | 2022 |
| Nitrite | MR | 25 | 2022 |
| Di(2-ethylhexyl) phthalate | MR | 22 | 2021 |
| Arsenic | MR | 20 | 2022 |
| Total Polychlorinated Biphenyls (PCB) | MR | 18 | 2023 |
| BHC-GAMMA | MR | 16 | 2023 |
| Di(2-ethylhexyl) adipate | MR | 16 | 2021 |
| Heptachlor | MR | 16 | 2023 |
| HEXACHLOROBENZENE | MR | 16 | 2023 |
| Chlordane | MR | 16 | 2023 |
| Endrin | MR | 16 | 2023 |
| Toxaphene | MR | 16 | 2023 |
| Diquat | MR | 16 | 2023 |
| Hexachlorocyclopentadiene | MR | 16 | 2023 |
| Heptachlor epoxide | MR | 16 | 2023 |
| Methoxychlor | MR | 16 | 2023 |
| LASSO | MR | 16 | 2023 |
| Dalapon | MR | 14 | 2023 |
| Picloram | MR | 14 | 2023 |
| Dinoseb | MR | 14 | 2023 |
| 2,4-D | MR | 14 | 2023 |
| Pentachlorophenol | MR | 14 | 2023 |
| 2,4,5-TP | MR | 14 | 2023 |
| Glyphosate | MR | 12 | 2020 |
| OXAMYL | MR | 12 | 2020 |
| Simazine | MR | 12 | 2020 |
| Carbofuran | MR | 12 | 2020 |
| Atrazine | MR | 12 | 2020 |
| ETHYLENE DIBROMIDE | MR | 12 | 2020 |
| Endothall | MR | 12 | 2020 |
Violation Count vs. the National Corpus
Duncannon Muni Water has 746 recorded EPA violations, 98% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 2% carry more. 2% of this system's own violations are health-based (14 of 746), and it ranks #13,666 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)
746 Higher than most more violations than 98% 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
SDWIS compliance record for Duncannon Muni Water
746 violations on record for PA7500019; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.
Sources: EPA SDWIS · Pennsylvania DEP, Bureau of Safe Drinking Water
Nationwide peers
746 violations · 2,000 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 Duncannon Muni Water
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.