Community Water System · PWS ID2310005
Nezperce Water Dept
Operator location Nezperce, Idaho - 26% of 54 violations are health-based (upper-third health share (> 23%)); groundwater source; 460 served per SDWIS.
- 460
- People served (this PWS)
- 54
- EPA violations (this PWS)
- 14
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Nezperce Water Dept standing, mid SDWIS violation third
26% of 54 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
Nezperce Water Dept lands in the middle third by violation volume (54), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (460; 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.
- 54
- Total EPA violations on record
- 26%
- Health-based (MCL / treatment failure)
- 460
- 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
- Local
- Connections
- 293
- County
- Lewis
- School/Daycare
- No
- MCL Violations
- 11
- Monitoring Violations
- 37
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | MON | 18 | 2024 |
| Coliform (TCR) | MCL | 11 | 2008 |
| Coliform (TCR) | MR | 7 | 2012 |
| Nitrate | MR | 4 | 2021 |
| LEAD AND COPPER RULE REVISIONS | RPT | 3 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 3 | 2024 |
| Chromium | MR | 1 | 1979 |
| Cadmium | MR | 1 | 1979 |
| Fluoride | MR | 1 | 1979 |
| Barium | MR | 1 | 1979 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Mercury | MR | 1 | 1979 |
| Selenium | MR | 1 | 1979 |
| Arsenic | MR | 1 | 1979 |
Violation Count vs. the National Corpus
Nezperce Water Dept has 54 recorded EPA violations, 59% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 41% carry more. 26% of this system's own violations are health-based (14 of 54), 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)
54 Around the middle fewer violations than 41% 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 Nezperce Water Dept
14 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for ID2310005.
Sources: EPA SDWIS
Nationwide peers
54 violations · 460 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with Nezperce 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.