County profile · EPA SDWIS + UCMR5
Nez Perce County, Idaho
25 SDWIS-listed public water systems serve 39,929 people in Nez Perce County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.
- 25
- SDWIS water systems Middle third of counties
- 1,887
- Total violations Middle third of counties
- 96.0%
- SDWIS systems w/ a violation Middle third of counties
- 50.0%
- UCMR5 PFAS rate (2 tested) Upper third of counties with tests
SDWIS compliance plate
Sheet ID069 · Nez Perce County 25 sys · 1,887 viol · #1111/3254
VIOL-SEVERE · HEALTH-MID · RANK-UPPER · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-SMALL · BOOK-FULL
- VIOL-SEVERE 96.0% flagged
- HEALTH-MID 30.8% health
- RANK-UPPER #1111/3254
- PHOTO-FINISH ±0.0 pp
- PFAS-HIGH 50.0% detect
- SRC-GW GW lead 92%
- SYS-SMALL 25 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Owyhee County (+ 0 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, Nez Perce County ranks #1,111 of 3,254 counties by people served, and #9 of 44 counties in Idaho. See methodology · corpus placement.
Nez Perce County standing, mid-flagged corpus third
Flagged-system rate 96.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 30.8% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 50.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #1,111 of 3,254 · #9 of 44 in Idaho.
Flagged-rate neighbourhood around Nez Perce County
Lowest/highest poles plus in-state counties nearest Nez Perce County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Lewiston Orchards Irrigation Dist | 20,000 | 180 | Clean |
| Lewiston City Of | 15,001 | 2 | Detected |
| Clearwater Paper Corporation | 1,550 | 1 | - |
| Federal Cartridge Company | 765 | 4 | - |
| Red Pheasant Water Company LLC | 480 | 92 | - |
| Culdesac City Of | 382 | 30 | - |
| Lapwai City Of | 325 | 66 | - |
| Peck Water System | 210 | 86 | - |
| Cougar Ridge Water & Sewer | 173 | 13 | - |
| Eagles Pointe Subdivision | 110 | 75 | - |
| Waha Glen Water Dist | 100 | 38 | - |
| Rivaura Winery | 100 | 0 | - |
| Eaton Mobile Home Court | 94 | 225 | - |
| Lenore Rest Stop Itd | 80 | 5 | - |
| Tammany Alternative Center | 80 | 93 | - |
| Nps Nez Perce National Historical Park | 75 | 5 | - |
| Atlas Sand and Rock Inc | 63 | 6 | - |
| Drovers Run at Jacques Spur | 60 | 44 | - |
| Red Rock Water LLC | 60 | 521 | - |
| View Point Subdivision | 56 | 77 | - |
| Lewiston Roundup | 50 | 232 | - |
| Western States Equipment | 35 | 13 | - |
| Canyon Inn | 30 | 69 | - |
| Lewiston Hill Port of Entry Itd | 25 | 4 | - |
| Blm McKays Bend Recreation Site | 25 | 6 | - |
Compare beyond Idaho
Mid-flagged peers for Nez Perce County
Cross-state counties nearest Nez Perce County on flagged-system share (96.0%) and cumulative violation count (1,887). In-state neighbours stay on the compliance plate above.
Similar flagged-system rate
Nearest cross-state counties by % of SDWIS systems with at least one violation on record.
Similar violation load
Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).
Read our methodology · Check your water system - how this data is sourced, computed, and verified.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.