Community Water System · PWS ID4080024
Horseshoe Bend Water Supply
Operator location Horseshoe Bend, Idaho - 55% of 122 violations are health-based (upper-third health share (> 23%)); surface water source; 750 served per SDWIS.
- 750
- People served (this PWS)
- 122
- EPA violations (this PWS)
- 67
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Horseshoe Bend Water Supply standing, high SDWIS violation third
55% of 122 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 55% is upper-third health share (> 23%). Population rank #23,351 of 29,740 among systems serving 500+.
The verdict
Horseshoe Bend Water Supply sits in the upper third of the sitemap cohort by violation count (122), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (750; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 55% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #23,351 of 29,740
- Population · /systems
- #164 of 249
- Population · ID
- 122
- Total EPA violations on record
- 55%
- 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
- Private
- Connections
- 411
- County
- Boise
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 53
- Treatment Tech Violations
- 67
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | TT | 67 | 2006 |
| Bromate | MR | 10 | 2025 |
| Chlorine | MR | 8 | 2011 |
| Interim Enhanced Surface Water Treatment Rule | MR | 7 | 2007 |
| Surface Water Treatment Rule | MR | 7 | 2011 |
| E. COLI | MR | 4 | 2017 |
| CARBON, TOTAL | MR | 4 | 2024 |
| Revised Total Coliform Rule | MON | 3 | 2017 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2025 |
| Arsenic | MR | 2 | 2003 |
| Lead and Copper Rule | MR | 2 | 1998 |
| Nitrate | MR | 1 | 1996 |
| Coliform (TCR) | MR | 1 | 2011 |
| Thallium, Total | MR | 1 | 1996 |
| Beryllium, Total | MR | 1 | 1996 |
| Nickel | MR | 1 | 1996 |
| Antimony, Total | MR | 1 | 1996 |
Violation Count vs. the National Corpus
Horseshoe Bend Water Supply has 122 recorded EPA violations, 77% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 23% carry more. 55% of this system's own violations are health-based (67 of 122), and it ranks #23,351 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)
122 Higher than most more violations than 77% 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 Horseshoe Bend Water Supply
67 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for ID4080024.
Sources: EPA SDWIS
Nationwide peers
122 violations · 750 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 with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Horseshoe Bend Water Supply
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.