Community Water System · PWS IA3130091
Dyersville Municipal Water Co
Operator location Dyersville, Iowa - 57% of 268 violations are health-based (upper-third health share (> 23%)); groundwater source; 4,477 served per SDWIS.
- 4,477
- People served (this PWS) Larger third of systems
- 268
- EPA violations (this PWS) Upper third of systems
- 153
- Health-based (this PWS) Upper third by health-based share
- No PFAS
- UCMR5 (this PWS) Tested, none detected
Dyersville Municipal Water Co standing, high SDWIS violation third
57% of 268 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 57% is upper-third health share (> 23%). UCMR5: UCMR5 tested, none detected. Population rank #8,283 of 29,740 among systems serving 500+.
The verdict
Dyersville Municipal Water Co sits in the upper third of the sitemap cohort by violation count (268), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (4,477; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 57% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #8,283 of 29,740
- Population · /systems
- #110 of 545
- Population · IA
- 268
- Total EPA violations on record
- 57%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 2,085
- County
- Dubuque
- School/Daycare
- No
- MCL Violations
- 153
- Monitoring Violations
- 110
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 136 | 2016 |
| Nitrate | MR | 42 | 1996 |
| Styrene | MR | 20 | 1993 |
| Ethylbenzene | MR | 20 | 1993 |
| Nitrate | MCL | 17 | 1995 |
| Xylenes, Total | MR | 15 | 1993 |
| Combined Radium (-226 and -228) | MR | 12 | 2021 |
| Lead and Copper Rule | MR | 1 | 1992 |
Violation Count vs. the National Corpus
Dyersville Municipal Water Co has 268 recorded EPA violations, 89% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 11% carry more. 57% of this system's own violations are health-based (153 of 268), and it ranks #8,283 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)
268 Higher than most more violations than 89% 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
How many violations vs. how serious, among peer systems
Dyersville Municipal Water Co plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.
Violation volume vs. health-based share
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| HFPO-DA | 6/5/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 6/5/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 6/5/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 6/5/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTrDA | 6/5/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 6/5/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| NEtFOSAA | 6/5/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 6/5/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHpA | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 6/5/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFBA | 6/5/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 6/5/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 6/5/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFMPA | 6/5/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 6/5/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxA | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 6/5/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMBA | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 6/5/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 6/5/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMBA | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 6/5/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 6/5/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFBA | 6/5/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 6/5/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 6/5/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 6/5/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeA | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 6/5/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFTA | 6/5/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| NEtFOSAA | 6/5/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 6/5/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFHxS | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 6/5/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBS | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 6/5/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 6/5/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
Health-based violations on Dyersville Municipal Water Co
153 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for IA3130091.
Sources: EPA SDWIS
Nationwide peers
268 violations · 4,477 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 with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Dyersville Municipal Water Co
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.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.