Non-Transient Non-Community Water System · PWS MD1120017
Harford Christian School
Operator location Darlington, Maryland - 49% of 61 violations are health-based (upper-third health share (> 23%)); groundwater source; 500 served per SDWIS.
- 500
- People served (this PWS)
- 61
- EPA violations (this PWS)
- 30
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Harford Christian School standing, mid SDWIS violation third
49% of 61 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 49% is upper-third health share (> 23%). Population rank #28,980 of 29,740 among systems serving 500+.
The verdict
Harford Christian School lands in the middle third by violation volume (61), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (500; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 49% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #28,980 of 29,740
- Population · /systems
- #431 of 437
- Population · MD
- 61
- Total EPA violations on record
- 49%
- 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
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- Harford
- School/Daycare
- Yes
- MCL Violations
- 16
- Monitoring Violations
- 25
- Treatment Tech Violations
- 14
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 24 | 2023 |
| Lead and Copper Rule | TT | 14 | 2004 |
| Nitrate | MCL | 12 | 2006 |
| Coliform (TCR) | MCL | 4 | 2013 |
| Nitrate | MR | 1 | 2017 |
Violation Count vs. the National Corpus
Harford Christian School has 61 recorded EPA violations, 62% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 38% carry more. 49% of this system's own violations are health-based (30 of 61), and it ranks #28,980 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)
61 Around the middle fewer violations than 38% 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 Harford Christian School
30 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for MD1120017.
Sources: EPA SDWIS
Nationwide peers
61 violations · 500 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Harford Christian School
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Maryland compares on the same EPA violation measures. Maryland 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.