Non-Transient Non-Community Water System · PWS ID1280108
Lacon Water Co Op
Operator location Harrison, Idaho - smaller served population (≤ 999) at 68 people served; 103 SDWIS violations on record from groundwater sources.
- 68
- People served (this PWS)
- 103
- EPA violations (this PWS)
- 8
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Lacon Water Co Op standing, high SDWIS violation third
68 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 8% is middle-third health share (≤ 23%).
The verdict
Lacon Water Co Op sits in the upper third of the sitemap cohort by violation count (103), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (68; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 8% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 103
- Total EPA violations on record
- 8%
- Health-based (MCL / treatment failure)
- 68
- 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
- 27
- County
- Kootenai
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 91
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 32 | 2011 |
| Revised Total Coliform Rule | MON | 14 | 2017 |
| Nitrate | MR | 4 | 2018 |
| Coliform (TCR) | MCL | 4 | 1996 |
| Revised Total Coliform Rule | TT | 4 | 2016 |
| Public Notice | Other | 3 | 2016 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | 1993 |
| LASSO | MR | 1 | 1993 |
| Atrazine | MR | 1 | 1993 |
| Chlordane | MR | 1 | 1993 |
| Heptachlor | MR | 1 | 1993 |
| Heptachlor epoxide | MR | 1 | 1993 |
| BHC-GAMMA | MR | 1 | 1993 |
| Toxaphene | MR | 1 | 1993 |
| 2,4-D | MR | 1 | 1993 |
| 2,4,5-TP | MR | 1 | 1993 |
| Benzene | MR | 1 | 1993 |
| 1,1-Dichloroethylene | MR | 1 | 1993 |
| 1,2-Dichloroethane | MR | 1 | 1993 |
| 1,2-Dichloropropane | MR | 1 | 1993 |
| CHLOROBENZENE | MR | 1 | 1993 |
| Styrene | MR | 1 | 1993 |
| Tetrachloroethylene | MR | 1 | 1993 |
| Barium | MR | 1 | 1979 |
| Selenium | MR | 1 | 1979 |
| Chromium | MR | 1 | 1979 |
| Mercury | MR | 1 | 1979 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Arsenic | MR | 1 | 1979 |
| cis-1,2-Dichloroethylene | MR | 1 | 1993 |
Violation Count vs. the National Corpus
Lacon Water Co Op has 103 recorded EPA violations, 74% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 26% carry more. 8% of this system's own violations are health-based (8 of 103), 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)
103 Around the middle fewer violations than 26% 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
Population served record for Lacon Water Co Op
EPA SDWIS lists 68 people served and 27 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
103 violations · 68 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 Lacon Water Co Op
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.