Community Water System · PWS ID1280290
Black Rock Utilities Inc
Operator location Hayden, Idaho - 6% of 34 violations are health-based (middle-third health share (≤ 23%)); groundwater source; 1,014 served per SDWIS.
- 1,014
- People served (this PWS)
- 34
- EPA violations (this PWS)
- 2
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Black Rock Utilities Inc standing, mid SDWIS violation third
6% of 34 recorded violations are health-based - middle-third health share (≤ 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 6% is middle-third health share (≤ 23%). Population rank #19,289 of 29,740 among systems serving 500+.
The verdict
Black Rock Utilities Inc lands in the middle third by violation volume (34), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 1,014 (mid served population (≤ 3,309)). Health-based share is 6% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #19,289 of 29,740
- Population · /systems
- #120 of 249
- Population · ID
- 34
- Total EPA violations on record
- 6%
- 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
- 259
- County
- Kootenai
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 32
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Gross Alpha, Excl. Radon and U | MR | 6 | 2016 |
| Radium-226 | MR | 6 | 2016 |
| Combined Uranium | MR | 6 | 2016 |
| Radium-228 | MR | 6 | 2016 |
| Chlorine | MR | 4 | 2022 |
| Revised Total Coliform Rule | MON | 4 | 2018 |
| Coliform (TCR) | MCL | 2 | 2010 |
Violation Count vs. the National Corpus
Black Rock Utilities Inc has 34 recorded EPA violations, 46% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 54% carry more. 6% of this system's own violations are health-based (2 of 34), and it ranks #19,289 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)
34 Lower than most fewer violations than 54% 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 Black Rock Utilities Inc
2 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for ID1280290.
Sources: EPA SDWIS
Nationwide peers
34 violations · 1,014 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.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Black Rock Utilities Inc
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.