Community Water System · PWS ID6150010
Grace City Of
Operator location Grace, Idaho - 24% of 42 violations are health-based (upper-third health share (> 23%)); groundwater source; 920 served per SDWIS.
- 920
- People served (this PWS)
- 42
- EPA violations (this PWS)
- 10
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Grace City Of standing, mid SDWIS violation third
24% of 42 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 24% is upper-third health share (> 23%). Population rank #20,721 of 29,740 among systems serving 500+.
The verdict
Grace City Of lands in the middle third by violation volume (42), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (920; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 24% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #20,721 of 29,740
- Population · /systems
- #135 of 249
- Population · ID
- 42
- Total EPA violations on record
- 24%
- 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
- Local
- Connections
- 466
- County
- Caribou
- School/Daycare
- No
- MCL Violations
- 5
- Monitoring Violations
- 32
- Treatment Tech Violations
- 5
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 5 | 2005 |
| Lead and Copper Rule | TT | 5 | 2023 |
| Coliform (TCR) | MR | 3 | 1997 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | 1993 |
| Atrazine | MR | 1 | 1993 |
| Chlordane | MR | 1 | 1993 |
| Heptachlor epoxide | MR | 1 | 1993 |
| Total Polychlorinated Biphenyls (PCB) | MR | 1 | 1993 |
| Pentachlorophenol | MR | 1 | 1993 |
| Simazine | MR | 1 | 1993 |
| Endrin | MR | 1 | 1993 |
| Hexachlorocyclopentadiene | MR | 1 | 1993 |
| Dinoseb | MR | 1 | 1993 |
| Picloram | MR | 1 | 1993 |
| Benzo(a)pyrene | MR | 1 | 1993 |
| Endothall | MR | 1 | 1993 |
| Diquat | MR | 1 | 1993 |
| LASSO | MR | 1 | 1993 |
| ETHYLENE DIBROMIDE | MR | 1 | 1993 |
| Di(2-ethylhexyl) adipate | MR | 1 | 1993 |
| BHC-GAMMA | MR | 1 | 1993 |
| OXAMYL | MR | 1 | 1993 |
| Methoxychlor | MR | 1 | 1993 |
| Carbofuran | MR | 1 | 1993 |
| 2,4,5-TP | MR | 1 | 1993 |
| Nitrate | MR | 1 | 1996 |
| Glyphosate | MR | 1 | 1993 |
| HEXACHLOROBENZENE | MR | 1 | 1993 |
| Dalapon | MR | 1 | 1993 |
| Heptachlor | MR | 1 | 1993 |
Violation Count vs. the National Corpus
Grace City Of has 42 recorded EPA violations, 52% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 48% carry more. 24% of this system's own violations are health-based (10 of 42), and it ranks #20,721 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)
42 Around the middle fewer violations than 48% 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 Grace City Of
10 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for ID6150010.
Sources: EPA SDWIS
Nationwide peers
42 violations · 920 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 with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Grace City Of
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.