Community Water System · PWS ID4080025
Idaho City Water Dept
Operator location Idaho City, Idaho - 26% of 205 violations are health-based (upper-third health share (> 23%)); surface water source; 478 served per SDWIS.
- 478
- People served (this PWS)
- 205
- EPA violations (this PWS)
- 53
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Idaho City Water Dept standing, high SDWIS violation third
26% of 205 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 26% is upper-third health share (> 23%).
The verdict
Idaho City Water Dept sits in the upper third of the sitemap cohort by violation count (205), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (478; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 26% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 205
- Total EPA violations on record
- 26%
- Health-based (MCL / treatment failure)
- 478
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
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
- 255
- County
- Boise
- School/Daycare
- No
- MCL Violations
- 1
- Monitoring Violations
- 146
- Treatment Tech Violations
- 52
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | MR | 42 | 2017 |
| Interim Enhanced Surface Water Treatment Rule | TT | 37 | 2023 |
| Interim Enhanced Surface Water Treatment Rule | MR | 23 | 2019 |
| Chlorine | MR | 22 | 2017 |
| Surface Water Treatment Rule | TT | 12 | 2014 |
| Coliform (TCR) | MR | 10 | 2006 |
| Lead and Copper Rule | MR | 9 | 2017 |
| E. COLI | MR | 6 | 2018 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2017 |
| Nitrate | MR | 4 | 2007 |
| Public Notice | Other | 4 | 2017 |
| Revised Total Coliform Rule | MON | 3 | 2016 |
| CYANIDE | MR | 3 | 2022 |
| Groundwater Rule | TT | 3 | 2019 |
| Arsenic | MR | 2 | 2007 |
| TTHM | MR | 2 | 2008 |
| Endothall | MR | 2 | 2017 |
| Radium-228 | MR | 2 | 2020 |
| Radium-226 | MR | 2 | 2020 |
| Nickel | MR | 1 | 2005 |
| Coliform (TCR) | MCL | 1 | 1995 |
| Dalapon | MR | 1 | 1996 |
| Picloram | MR | 1 | 1996 |
| 2,4-D | MR | 1 | 1996 |
| Thallium, Total | MR | 1 | 2005 |
| Dinoseb | MR | 1 | 1996 |
| 2,4,5-TP | MR | 1 | 1996 |
| Di(2-ethylhexyl) phthalate | MR | 1 | 1996 |
| Beryllium, Total | MR | 1 | 2005 |
| Antimony, Total | MR | 1 | 2005 |
Violation Count vs. the National Corpus
Idaho City Water Dept has 205 recorded EPA violations, 86% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 14% carry more. 26% of this system's own violations are health-based (53 of 205), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
205 Higher than most more violations than 86% 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 Idaho City Water Dept
53 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for ID4080025.
Sources: EPA SDWIS
Nationwide peers
205 violations · 478 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.
What to do with Idaho City Water Dept
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.