Community Water System · PWS ID5160031
Oakley Valley Water Corporation
Operator location Oakley, Idaho - 39% of 239 violations are health-based (upper-third health share (> 23%)); groundwater source; 500 served per SDWIS.
- 500
- People served (this PWS)
- 239
- EPA violations (this PWS)
- 94
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Oakley Valley Water Corporation standing, high SDWIS violation third
39% of 239 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 39% is upper-third health share (> 23%). Population rank #28,829 of 29,740 among systems serving 500+.
The verdict
Oakley Valley Water Corporation sits in the upper third of the sitemap cohort by violation count (239), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (500; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 39% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #28,829 of 29,740
- Population · /systems
- #242 of 249
- Population · ID
- 239
- Total EPA violations on record
- 39%
- Health-based (MCL / treatment failure)
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
- 178
- County
- Cassia
- School/Daycare
- No
- MCL Violations
- 8
- Monitoring Violations
- 113
- Treatment Tech Violations
- 86
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Groundwater Rule | TT | 84 | 2024 |
| Chlorine | MR | 26 | 2025 |
| Public Notice | Other | 24 | 2024 |
| Coliform (TCR) | MR | 18 | 2011 |
| Revised Total Coliform Rule | MON | 12 | 2024 |
| Coliform (TCR) | MCL | 8 | 2011 |
| Nitrite | MR | 5 | 2018 |
| E. COLI | MR | 4 | 2023 |
| Groundwater Rule | Other | 3 | 2024 |
| Lead and Copper Rule | MR | 3 | 2024 |
| TTHM | MR | 2 | 2004 |
| Total Haloacetic Acids (HAA5) | MR | 2 | 2004 |
| Lead and Copper Rule | TT | 2 | 1995 |
| Groundwater Rule | MR | 2 | 2024 |
| Barium | MR | 1 | 1993 |
| Fluoride | MR | 1 | 1993 |
| LASSO | 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 |
| Total Polychlorinated Biphenyls (PCB) | MR | 1 | 1993 |
| Pentachlorophenol | MR | 1 | 1993 |
| Carbofuran | MR | 1 | 1993 |
| 1,2-Dichloroethane | MR | 1 | 1993 |
| 1,2-Dichloropropane | MR | 1 | 1993 |
| Styrene | MR | 1 | 1993 |
| Tetrachloroethylene | MR | 1 | 1993 |
| 1,1,1-Trichloroethane | MR | 1 | 1993 |
Violation Count vs. the National Corpus
Oakley Valley Water Corporation has 239 recorded EPA violations, 88% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 12% carry more. 39% of this system's own violations are health-based (94 of 239), and it ranks #28,829 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
239 Higher than most more violations than 88% 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 Oakley Valley Water Corporation
94 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for ID5160031.
Sources: EPA SDWIS
Nationwide peers
239 violations · 500 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.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Oakley Valley Water Corporation
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.