Non-Transient Non-Community Water System · PWS PA7220377
Conewago Twp Elem Sch
Operator location Hummelstown, Pennsylvania - 23% of 166 violations are health-based (upper-third health share (> 23%)); groundwater source; 250 served per SDWIS.
- 250
- People served (this PWS)
- 166
- EPA violations (this PWS)
- 38
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Conewago Twp Elem Sch standing, high SDWIS violation third
23% of 166 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 23% is upper-third health share (> 23%).
The verdict
Conewago Twp Elem Sch sits in the upper third of the sitemap cohort by violation count (166), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (250; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 23% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 166
- Total EPA violations on record
- 23%
- Health-based (MCL / treatment failure)
- 250
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 1
- County
- Dauphin
- School/Daycare
- Yes
- MCL Violations
- 30
- Monitoring Violations
- 104
- Treatment Tech Violations
- 8
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 22 | 2014 |
| Nitrite | MR | 20 | 2015 |
| Nitrate | MR | 18 | 2015 |
| Public Notice | Other | 16 | 2014 |
| Groundwater Rule | MR | 12 | 2025 |
| Lead and Copper Rule | MR | 10 | 2017 |
| Nitrate | MCL | 8 | 2013 |
| Groundwater Rule | TT | 8 | 2023 |
| Chlorine | MR | 6 | 2016 |
| p-Dichlorobenzene | MR | 4 | 1991 |
| Vinyl chloride | MR | 4 | 1991 |
| 1,1-Dichloroethylene | MR | 4 | 1991 |
| Trichloroethylene | MR | 4 | 1991 |
| Benzene | MR | 4 | 1991 |
| Carbon tetrachloride | MR | 4 | 1991 |
| 1,2-Dichloroethane | MR | 4 | 1991 |
| Revised Total Coliform Rule | MON | 4 | 2020 |
| 1,1,1-Trichloroethane | MR | 4 | 1991 |
| Coliform (TCR) | MR | 2 | 1997 |
Violation Count vs. the National Corpus
Conewago Twp Elem Sch has 166 recorded EPA violations, 83% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 17% carry more. 23% of this system's own violations are health-based (38 of 166), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
166 Higher than most more violations than 83% 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 Conewago Twp Elem Sch
38 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for PA7220377.
Sources: EPA SDWIS · Pennsylvania DEP, Bureau of Safe Drinking Water
Nationwide peers
166 violations · 250 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.
What to do with Conewago Twp Elem Sch
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.