Community Water System · PWS KS2003903
Oberlin, City Of
Operator location Oberlin, Kansas - 92% of 346 violations are health-based (upper-third health share (> 23%)); groundwater source; 1,639 served per SDWIS.
- 1,639
- People served (this PWS)
- 346
- EPA violations (this PWS)
- 317
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Oberlin, City Of standing, high SDWIS violation third
92% of 346 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 92% is upper-third health share (> 23%). Population rank #15,158 of 29,740 among systems serving 500+.
The verdict
Oberlin, City Of sits in the upper third of the sitemap cohort by violation count (346), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,639 (mid served population (≤ 3,309)). Health-based share is 92% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #15,158 of 29,740
- Population · /systems
- #189 of 424
- Population · KS
- 346
- Total EPA violations on record
- 92%
- 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
- 970
- County
- Decatur
- School/Daycare
- No
- MCL Violations
- 317
- Monitoring Violations
- 12
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Uranium | MCL | 159 | 2014 |
| Arsenic | MCL | 122 | 2014 |
| Nitrate | MCL | 17 | 1997 |
| Public Notice | Other | 14 | 2014 |
| Gross Alpha, Excl. Radon and U | MCL | 11 | 2012 |
| Nitrite | MCL | 6 | 1994 |
| TTHM | MR | 4 | 2023 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2023 |
| Lead and Copper Rule | MR | 4 | 2018 |
| Selenium | MCL | 2 | 1985 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2025 |
| Consumer Confidence Rule | Other | 1 | 2001 |
Violation Count vs. the National Corpus
Oberlin, City Of has 346 recorded EPA violations, 92% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 8% carry more. 92% of this system's own violations are health-based (317 of 346), and it ranks #15,158 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)
346 Higher than most more violations than 92% 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 Oberlin, City Of
317 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for KS2003903.
Sources: EPA SDWIS
Nationwide peers
346 violations · 1,639 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 Oberlin, City Of
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Kansas compares on the same EPA violation measures. Kansas 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.