Community Water System · PWS ID7220004
Ashton City Of
Operator location Ashton, Idaho - 71% of 188 violations are health-based (upper-third health share (> 23%)); groundwater source; 1,129 served per SDWIS.
- 1,129
- People served (this PWS)
- 188
- EPA violations (this PWS)
- 133
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Ashton City Of standing, high SDWIS violation third
71% of 188 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 71% is upper-third health share (> 23%). Population rank #18,378 of 29,740 among systems serving 500+.
The verdict
Ashton City Of sits in the upper third of the sitemap cohort by violation count (188), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,129 (mid served population (≤ 3,309)). Health-based share is 71% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #18,378 of 29,740
- Population · /systems
- #111 of 249
- Population · ID
- 188
- Total EPA violations on record
- 71%
- 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
- 516
- County
- Fremont
- School/Daycare
- No
- MCL Violations
- 133
- Monitoring Violations
- 41
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MCL | 127 | 2012 |
| Chlorine | MR | 11 | 2025 |
| Public Notice | Other | 8 | 2013 |
| Revised Total Coliform Rule | MON | 8 | 2020 |
| TTHM | MR | 6 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 6 | 2024 |
| Coliform (TCR) | MCL | 6 | 2001 |
| Coliform (TCR) | MR | 4 | 2002 |
| 2,4,5-TP | MR | 1 | 1996 |
| Nitrate | MR | 1 | 1996 |
| Dinoseb | MR | 1 | 1996 |
| 2,4-D | MR | 1 | 1996 |
| Picloram | MR | 1 | 1996 |
| Dalapon | MR | 1 | 1996 |
Violation Count vs. the National Corpus
Ashton City Of has 188 recorded EPA violations, 84% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 16% carry more. 71% of this system's own violations are health-based (133 of 188), and it ranks #18,378 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)
188 Higher than most more violations than 84% 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 Ashton City Of
133 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for ID7220004.
Sources: EPA SDWIS
Nationwide peers
188 violations · 1,129 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 Ashton City Of
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Idaho compares on the same EPA violation measures. Idaho 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.