Community Water System · PWS IA3130091
Dyersville Municipal Water Co
Dyersville, Iowa 52040 - drinking water served from groundwater sources to 4,477 people, tracked in EPA SDWIS and UCMR5.
- 4,477
- People served
- 268
- EPA violations
- 153
- Health-based
- No PFAS
- UCMR5 result
The verdict
EPA records 268 drinking-water violations at Dyersville Municipal Water Co, 57% of them health-based - above the Iowa per-system average.
- 268
- Total EPA violations on record
- 57%
- Health-based (MCL / treatment failure)
- 4,477
- People served by this system
- 0
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: Dyersville Municipal Water Co
Dyersville Municipal Water Co is a local-owned community water system that delivers drinking water to 4,477 residents in Dyersville, Iowa (Dubuque County) through 2,085 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 268 total violations for this system , of which 153 (57%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 110 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.
The most frequently cited contaminant at this system is Combined Radium (-226 and -228), recorded in 136 violations (MCL, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.
Across Iowa, EPA tracks 1,795 public water systems serving 3,114,444 people, with 138,271 cumulative violations and 27,946 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 77 violations. Statewide, 127 of 152 UCMR5-tested systems have reported PFAS detections (83.6%).
Dyersville Municipal Water Co's 268 violations sit above the Iowa average.
All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.
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 |
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 |
Verify This Water System
The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Dyersville Municipal Water Co.
EPA SDWIS, Federal Reports
EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:
View PWS ID IA3130091 on SDWISSource: EPA SDWIS Federal Reports Search
Iowa Drinking Water Authority
Iowa's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.
Find IA regulator via EPA SDWISViolation Timeline
Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.
| Year (latest) | Contaminant | Category | Count | EPA Record |
|---|---|---|---|---|
| 2021 | Combined Radium (-226 and -228) | MR | 12 | SDWIS / IA3130091 / 4010 |
| 2016 | Combined Radium (-226 and -228) | MCL | 136 | SDWIS / IA3130091 / 4010 |
| 1996 | Nitrate | MR | 42 | SDWIS / IA3130091 / 1040 |
| 1995 | Nitrate | MCL | 17 | SDWIS / IA3130091 / 1040 |
| 1993 | Styrene | MR | 20 | SDWIS / IA3130091 / 2996 |
| 1993 | Ethylbenzene | MR | 20 | SDWIS / IA3130091 / 2992 |
| 1993 | Xylenes, Total | MR | 15 | SDWIS / IA3130091 / 2955 |
| 1992 | Lead and Copper Rule | MR | 1 | SDWIS / IA3130091 / 5000 |
How Dyersville Municipal Water Co Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | Dyersville Municipal Water Co | Iowa avg | Federal benchmark |
|---|---|---|---|
| Total violations | 268 | 77 | SDWA compliance, any non-zero count is a recorded breach |
| Health-based violations | 153 | 15.6 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 83.6% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 4,477 | 1,735 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,795 regulated public water systems in Iowa.
Federal MCL reference, Safe Drinking Water Act thresholds ▼
| Contaminant | Federal MCL / Action Level | Note |
|---|---|---|
| Lead | 0 mg/L (Action Level: 0.015 mg/L) | Lead and Copper Rule treatment technique |
| Arsenic | 0.010 mg/L (10 ppb) | Health-based MCL since 2006 |
| Total Coliform | Treatment technique (RTCR) | Indicator organism, monitoring trigger |
| PFOA / PFOS (PFAS) | 4.0 ppt each (final 2024 rule) | Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026) |
| Nitrate (as N) | 10 mg/L | Acute health risk for infants |
Frequently Asked Questions
Is Dyersville Municipal Water Co water safe to drink? ▼
How many people does Dyersville Municipal Water Co serve? ▼
What type of violations does Dyersville Municipal Water Co have? ▼
Has PFAS been detected in Dyersville Municipal Water Co water? ▼
What water source does Dyersville Municipal Water Co use? ▼
Where does this data come from? ▼
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.