Community Water System · PWS IA5428031
Harper Water Supply
Operator location Muscatine, Iowa - 37% of 27 violations are health-based (upper-third health share (> 23%)); surface water source; 118 served per SDWIS.
- 118
- People served (this PWS)
- 27
- EPA violations (this PWS)
- 10
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Harper Water Supply standing, mid SDWIS violation third
37% of 27 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%).
The verdict
Harper Water Supply lands in the middle third by violation volume (27), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (118; 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.
- 27
- Total EPA violations on record
- 37%
- Health-based (MCL / treatment failure)
- 118
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
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
- 62
- County
- Keokuk
- School/Daycare
- No
- MCL Violations
- 10
- Monitoring Violations
- 7
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 10 | 1998 |
| Coliform (TCR) | MR | 4 | 2010 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2005 |
Violation Count vs. the National Corpus
Harper Water Supply has 27 recorded EPA violations, 39% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 60% carry more. 37% of this system's own violations are health-based (10 of 27), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
27 Lower than most fewer violations than 60% 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 Harper Water Supply
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 IA5428031.
Sources: EPA SDWIS
Nationwide peers
27 violations · 118 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.
What to do with Harper 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.