Community Water System · PWS OH3200411
Northwestern W and SD - McComb
Operator location Bowling Green, Ohio - 54% of 193 violations are health-based (upper-third health share (> 23%)); surface water source; 1,650 served per SDWIS.
- 1,650
- People served (this PWS)
- 193
- EPA violations (this PWS)
- 105
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Northwestern W and SD - McComb standing, high SDWIS violation third
54% of 193 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 54% is upper-third health share (> 23%). Population rank #15,104 of 29,740 among systems serving 500+.
The verdict
Northwestern W and SD - McComb sits in the upper third of the sitemap cohort by violation count (193), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,650 (mid served population (≤ 3,309)). Health-based share is 54% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #15,104 of 29,740
- Population · /systems
- #478 of 931
- Population · OH
- 193
- Total EPA violations on record
- 54%
- 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
- 648
- County
- Hancock
- School/Daycare
- No
- MCL Violations
- 93
- Monitoring Violations
- 77
- Treatment Tech Violations
- 12
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 49 | 2014 |
| Total Haloacetic Acids (HAA5) | MCL | 35 | 2024 |
| Surface Water Treatment Rule | MR | 25 | 2019 |
| Total Haloacetic Acids (HAA5) | MR | 10 | 2013 |
| TTHM | MR | 10 | 2013 |
| Coliform (TCR) | MCL | 9 | 1996 |
| Interim Enhanced Surface Water Treatment Rule | TT | 8 | 2015 |
| LASSO | MR | 8 | 2000 |
| Atrazine | MR | 8 | 2000 |
| Simazine | MR | 8 | 2000 |
| Consumer Confidence Rule | Other | 6 | 2024 |
| Fluoride | MR | 4 | 1997 |
| Arsenic | MR | 4 | 1997 |
| Surface Water Treatment Rule | TT | 4 | 2002 |
Violation Count vs. the National Corpus
Northwestern W and SD - McComb has 193 recorded EPA violations, 85% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 15% carry more. 54% of this system's own violations are health-based (105 of 193), and it ranks #15,104 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)
193 Higher than most more violations than 85% 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 Northwestern W and SD - McComb
105 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for OH3200411.
Sources: EPA SDWIS · Ohio EPA, Division of Drinking and Ground Waters
Nationwide peers
193 violations · 1,650 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 Northwestern W and SD - McComb
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Ohio compares on the same EPA violation measures. Ohio 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.