Community Water System · PWS IA8255060
Maysville Municipal Water Dept
Operator location Calamus, Iowa - smaller served population (≤ 999) at 156 people served; 133 SDWIS violations on record from groundwater sources.
- 156
- People served (this PWS)
- 133
- EPA violations (this PWS)
- 11
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Maysville Municipal Water Dept standing, high SDWIS violation third
156 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 8% is middle-third health share (≤ 23%).
The verdict
Maysville Municipal Water Dept sits in the upper third of the sitemap cohort by violation count (133), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (156; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 8% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 133
- Total EPA violations on record
- 8%
- Health-based (MCL / treatment failure)
- 156
- 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
- Scott
- School/Daycare
- No
- MCL Violations
- 11
- Monitoring Violations
- 75
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 33 | 2004 |
| Consumer Confidence Rule | Other | 18 | 2001 |
| Lead and Copper Rule | MR | 12 | 2001 |
| Coliform (TCR) | MCL | 11 | 2004 |
| Nitrate | MR | 10 | 1999 |
| Antimony, Total | MR | 4 | 1992 |
| BHC-GAMMA | MR | 4 | 1995 |
| Gross Alpha, Excl. Radon and U | MR | 3 | 1996 |
| Arsenic | MR | 3 | 2001 |
| 1,2,4-Trichlorobenzene | MR | 3 | 1995 |
| Combined Radium (-226 and -228) | MR | 3 | 1991 |
Violation Count vs. the National Corpus
Maysville Municipal Water Dept has 133 recorded EPA violations, 79% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 21% carry more. 8% of this system's own violations are health-based (11 of 133), 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)
133 Higher than most more violations than 79% 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
Population served record for Maysville Municipal Water Dept
EPA SDWIS lists 156 people served and 62 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
133 violations · 156 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.
What to do with Maysville Municipal Water Dept
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.