Community Water System · PWS IA6727028
Mapleton Municipal Water Plant
Operator location Mapleton, Iowa - 53% of 129 violations are health-based (upper-third health share (> 23%)); groundwater source; 1,124 served per SDWIS.
- 1,124
- People served (this PWS)
- 129
- EPA violations (this PWS)
- 68
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Mapleton Municipal Water Plant standing, high SDWIS violation third
53% of 129 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 53% is upper-third health share (> 23%). Population rank #18,417 of 29,740 among systems serving 500+.
The verdict
Mapleton Municipal Water Plant sits in the upper third of the sitemap cohort by violation count (129), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,124 (mid served population (≤ 3,309)). Health-based share is 53% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #18,417 of 29,740
- Population · /systems
- #309 of 545
- Population · IA
- 129
- Total EPA violations on record
- 53%
- 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
- 629
- County
- Monona
- School/Daycare
- No
- MCL Violations
- 68
- Monitoring Violations
- 41
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MCL | 45 | 2000 |
| Nitrate | MR | 23 | 2016 |
| Coliform (TCR) | MCL | 23 | 1998 |
| Gross Alpha, Excl. Radon and U | MR | 8 | 1990 |
| Nitrate | Other | 4 | 1994 |
| Antimony, Total | MR | 4 | 1992 |
| Coliform (TCR) | MR | 4 | 2015 |
| Lead and Copper Rule | MR | 2 | 2023 |
Violation Count vs. the National Corpus
Mapleton Municipal Water Plant has 129 recorded EPA violations, 78% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 22% carry more. 53% of this system's own violations are health-based (68 of 129), and it ranks #18,417 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)
129 Higher than most more violations than 78% 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 Mapleton Municipal Water Plant
68 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for IA6727028.
Sources: EPA SDWIS
Nationwide peers
129 violations · 1,124 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
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 Mapleton Municipal Water Plant
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.