Community Water System · PWS IA0607013
Blairstown Water Supply
Operator location Blairstown, Iowa - 37% of 54 violations are health-based (upper-third health share (> 23%)); groundwater source; 738 served per SDWIS.
- 738
- People served (this PWS)
- 54
- EPA violations (this PWS)
- 20
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Blairstown Water Supply standing, mid SDWIS violation third
37% of 54 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 37% is upper-third health share (> 23%). Population rank #23,684 of 29,740 among systems serving 500+.
The verdict
Blairstown Water Supply lands in the middle third by violation volume (54), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (738; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 37% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #23,684 of 29,740
- Population · /systems
- #433 of 545
- Population · IA
- 54
- Total EPA violations on record
- 37%
- 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
- 325
- County
- Benton
- School/Daycare
- No
- MCL Violations
- 20
- Monitoring Violations
- 23
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 8 | 1996 |
| Coliform (TCR) | MCL | 8 | 1993 |
| Coliform (TCR) | MR | 8 | 1992 |
| Total Haloacetic Acids (HAA5) | MR | 5 | 2005 |
| Nitrite | MR | 4 | 2004 |
| Xylenes, Total | MR | 4 | 1995 |
| Nitrite | MCL | 4 | 2024 |
| Nitrate | MR | 2 | 1988 |
Violation Count vs. the National Corpus
Blairstown Water Supply has 54 recorded EPA violations, 59% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 41% carry more. 37% of this system's own violations are health-based (20 of 54), and it ranks #23,684 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)
54 Around the middle fewer violations than 41% 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 Blairstown Water Supply
20 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for IA0607013.
Sources: EPA SDWIS
Nationwide peers
54 violations · 738 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 Blairstown Water Supply
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Iowa compares on the same EPA violation measures. Iowa 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.