Non-Transient Non-Community Water System · PWS ID2350027
Tammany Alternative Center
Operator location Lewiston, Idaho - 27% of 93 violations are health-based (upper-third health share (> 23%)); groundwater source; 80 served per SDWIS.
- 80
- People served (this PWS)
- 93
- EPA violations (this PWS)
- 25
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Tammany Alternative Center standing, high SDWIS violation third
27% of 93 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 27% is upper-third health share (> 23%).
The verdict
Tammany Alternative Center sits in the upper third of the sitemap cohort by violation count (93), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (80; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 27% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 93
- Total EPA violations on record
- 27%
- Health-based (MCL / treatment failure)
- 80
- 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
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 1
- County
- Nez Perce
- School/Daycare
- Yes
- MCL Violations
- 13
- Monitoring Violations
- 65
- Treatment Tech Violations
- 12
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | TT | 10 | 2024 |
| Coliform (TCR) | MR | 9 | 2013 |
| Lead and Copper Rule | MR | 8 | 2024 |
| Coliform (TCR) | MCL | 7 | 2015 |
| Nitrate | MCL | 6 | 2003 |
| Revised Total Coliform Rule | MON | 5 | 2024 |
| E. COLI | MR | 3 | 2022 |
| Lead and Copper Rule | TT | 2 | 2004 |
| Nitrate | MR | 2 | 1996 |
| Chromium | MR | 1 | 1993 |
| Selenium | MR | 1 | 1993 |
| Carbon tetrachloride | MR | 1 | 1993 |
| 1,1-Dichloroethylene | MR | 1 | 1993 |
| trans-1,2-Dichloroethylene | MR | 1 | 1993 |
| 1,2-Dichloroethane | MR | 1 | 1993 |
| p-Dichlorobenzene | MR | 1 | 1993 |
| Styrene | MR | 1 | 1993 |
| 1,1,1-Trichloroethane | MR | 1 | 1993 |
| Nitrite | MR | 1 | 1993 |
| Barium | MR | 1 | 1993 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | 1993 |
| 2,4-D | MR | 1 | 1993 |
| 2,4,5-TP | MR | 1 | 1993 |
| Heptachlor | MR | 1 | 1993 |
| Heptachlor epoxide | MR | 1 | 1993 |
| BHC-GAMMA | MR | 1 | 1993 |
| Chlordane | MR | 1 | 1993 |
| Xylenes, Total | MR | 1 | 1993 |
| Carbofuran | MR | 1 | 1993 |
| Atrazine | MR | 1 | 1993 |
Violation Count vs. the National Corpus
Tammany Alternative Center has 93 recorded EPA violations, 72% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 28% carry more. 27% of this system's own violations are health-based (25 of 93), 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)
93 Around the middle fewer violations than 28% 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 Tammany Alternative Center
25 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for ID2350027.
Sources: EPA SDWIS
Nationwide peers
93 violations · 80 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 Tammany Alternative Center
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.