Community Water System · PWS PA7360029
Schoolhouse Apts
Operator location Columbia, Pennsylvania - smaller served population (≤ 999) at 38 people served; 162 SDWIS violations on record from groundwater sources.
- 38
- People served (this PWS)
- 162
- EPA violations (this PWS)
- 23
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Schoolhouse Apts standing, high SDWIS violation third
38 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 14% is middle-third health share (≤ 23%).
The verdict
Schoolhouse Apts sits in the upper third of the sitemap cohort by violation count (162), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (38; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 14% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 162
- Total EPA violations on record
- 14%
- Health-based (MCL / treatment failure)
- 38
- 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
- Community
- Owner Type
- Private
- Connections
- 15
- County
- Lancaster
- School/Daycare
- No
- MCL Violations
- 14
- Monitoring Violations
- 117
- Treatment Tech Violations
- 9
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MCL | 14 | 2009 |
| Public Notice | Other | 13 | 2013 |
| Nitrate | MR | 12 | 2006 |
| Coliform (TCR) | MR | 10 | 2003 |
| Consumer Confidence Rule | Other | 9 | 2005 |
| Groundwater Rule | TT | 6 | 2021 |
| Gross Alpha, Excl. Radon and U | MR | 5 | 2007 |
| Lead and Copper Rule | TT | 3 | 2004 |
| Endrin | MR | 3 | 2016 |
| BHC-GAMMA | MR | 3 | 2016 |
| Methoxychlor | MR | 3 | 2016 |
| Toxaphene | MR | 3 | 2016 |
| Hexachlorocyclopentadiene | MR | 3 | 2016 |
| Atrazine | MR | 3 | 2016 |
| Heptachlor | MR | 3 | 2016 |
| HEXACHLOROBENZENE | MR | 3 | 2016 |
| Benzo(a)pyrene | MR | 3 | 2016 |
| Chlordane | MR | 3 | 2016 |
| Simazine | MR | 3 | 2016 |
| Glyphosate | MR | 3 | 2016 |
| Heptachlor epoxide | MR | 3 | 2016 |
| Total Polychlorinated Biphenyls (PCB) | MR | 3 | 2016 |
| Diquat | MR | 3 | 2016 |
| LASSO | MR | 3 | 2016 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2016 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2016 |
| Combined Uranium | MR | 2 | 2007 |
| Radium-228 | MR | 2 | 2007 |
| Lead and Copper Rule | MR | 2 | 1995 |
| Barium | MR | 2 | 1994 |
Violation Count vs. the National Corpus
Schoolhouse Apts has 162 recorded EPA violations, 82% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 18% carry more. 14% of this system's own violations are health-based (23 of 162), 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)
162 Higher than most more violations than 82% 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
Population served record for Schoolhouse Apts
EPA SDWIS lists 38 people served and 15 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · Pennsylvania DEP, Bureau of Safe Drinking Water
Nationwide peers
162 violations · 38 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 Schoolhouse Apts
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.