Community Water System · PWS IA3126052
Dubuque Water Works
Operator location Dubuque, Iowa - 0% of 25 violations are health-based (lower-third health share (≤ 1%)); groundwater source; 59,667 served per SDWIS.
- 59,667
- People served (this PWS)
- 25
- EPA violations (this PWS)
- 0
- Health-based (this PWS)
- 2 PFAS
- UCMR5 (this PWS)
Dubuque Water Works standing, mid SDWIS violation third
0% of 25 recorded violations are health-based - lower-third health share (≤ 1%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 0% is lower-third health share (≤ 1%). UCMR5: lower-third PFAS panel (≤ 2 compounds). Population rank #894 of 29,740 among systems serving 500+.
The verdict
Dubuque Water Works lands in the middle third by violation volume (25), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is large (59,667; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is only 0% - almost all of this trail is monitoring or reporting. UCMR5 detected 2 PFAS compounds (lower-third PFAS panel (≤ 2 compounds)).
- #894 of 29,740
- Population · /systems
- #10 of 545
- Population · IA
- 25
- Total EPA violations on record
- 0%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
2 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 23,954
- County
- Dubuque
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 6
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MR | 4 | 2008 |
| Chlorine | MR | 2 | 2005 |
Violation Count vs. the National Corpus
Dubuque Water Works has 25 recorded EPA violations, 37% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 62% carry more. 0% of this system's own violations are health-based (0 of 25), and it ranks #894 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)
25 Lower than most fewer violations than 62% 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
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 3 of 58 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| NEtFOSAA | 7/17/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 7/17/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 7/17/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFDoA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 7/17/2023 | 5.10 ppt | 4.00 ppt | Detected |
| PFOS | 7/17/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 7/17/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 7/17/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| NMeFOSAA | 7/17/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTrDA | 7/17/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| 9Cl-PF3ONS | 7/17/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 7/17/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFEESA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 7/17/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 7/17/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 7/17/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 7/17/2023 | 13.00 ppt | 5.00 ppt | Detected |
| 4:2 FTS | 7/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 7/17/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NFDHA | 7/17/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFHxS | 2/14/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 2/14/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMBA | 2/14/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 2/14/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 2/14/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 2/14/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 2/14/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 2/14/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 2/14/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 2/14/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFOA | 2/14/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBA | 2/14/2024 | 8.00 ppt | 5.00 ppt | Detected |
| 9Cl-PF3ONS | 2/14/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| NFDHA | 2/14/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 2/14/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 2/14/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 2/14/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 2/14/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 2/14/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 2/14/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 2/14/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
Health-based violations on Dubuque Water Works
0 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for IA3126052.
Sources: EPA SDWIS
Nationwide peers
25 violations · 59,667 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.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Dubuque Water Works
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.