Community Water System · PWS IA3170001
Peosta Water Supply
Operator location Peosta, Iowa - 9% of 65 violations are health-based (middle-third health share (≤ 23%)); groundwater source; 2,278 served per SDWIS.
- 2,278
- People served (this PWS)
- 65
- EPA violations (this PWS)
- 6
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Peosta Water Supply standing, mid SDWIS violation third
9% of 65 recorded violations are health-based - middle-third health share (≤ 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 9% is middle-third health share (≤ 23%). Population rank #12,617 of 29,740 among systems serving 500+.
The verdict
Peosta Water Supply lands in the middle third by violation volume (65), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 2,278 (mid served population (≤ 3,309)). Health-based share is 9% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #12,617 of 29,740
- Population · /systems
- #184 of 545
- Population · IA
- 65
- Total EPA violations on record
- 9%
- 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
- 1,671
- County
- Dubuque
- School/Daycare
- No
- MCL Violations
- 6
- Monitoring Violations
- 59
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 21 | 2005 |
| Nitrate | MR | 16 | 2002 |
| Chlorine | MR | 14 | 2006 |
| Nitrate | MCL | 6 | 2002 |
| Lead and Copper Rule | MR | 4 | 2006 |
| Nitrite | MR | 4 | 2003 |
Violation Count vs. the National Corpus
Peosta Water Supply has 65 recorded EPA violations, 63% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 36% carry more. 9% of this system's own violations are health-based (6 of 65), and it ranks #12,617 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)
65 Around the middle fewer violations than 36% 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 Peosta Water Supply
6 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for IA3170001.
Sources: EPA SDWIS
Nationwide peers
65 violations · 2,278 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 Peosta 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.