- EPA's UCMR 5 testing looked for 30 contaminants here and found 2.
- PFBA (a PFAS): found in 2 of 2 samples, average 10.5 ppt, highest 13 ppt (EPA UCMR 5 testing, Jul 2023–Feb 2024)
- PFOA (a PFAS): found in 1 of 2 samples, average 2.6 ppt, highest 5.1 ppt (EPA UCMR 5 testing, Jul 2023–Feb 2024)
- Lead: 9 in 10 homes tested came in at or below 5 ppb, at or below EPA's 15 ppb action level (latest EPA result for a testing period that ran on or after July 1, 2021: Jan 1, 2021–Dec 31, 2023). This is one number for the whole water system, from homes the utility tested. It isn't a result for your home.
Public EPA test results
Can you drink Dubuque tap water? What EPA records show
EPA system ID IA3126052 · serves Dubuque, IA · about 59,667 people (EPA records)
Here's what EPA has on file for this water system: its testing for newer contaminants like PFAS (UCMR 5), lead testing and violations. It's not a test of your tap, and there's no Water Score here.
Public EPA test results
Dubuque Water Works (EPA IA3126052)
ScoreYourWater.com gives no verdict on your tap water; it shows what the public records say, as of October 14, 2026. For Dubuque's main utility, Dubuque Water Works: We found no health-standard violations in EPA's records for this system (IA3126052) since July 1, 2021, as of October 14, 2026. EPA's UCMR 5 testing looked for 30 contaminants here and found 2.
What EPA records show for Dubuque Water Works, as of October 14, 2026
We found no health-standard violations in EPA's records for this system (IA3126052) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Dubuque Water Works (SDWIS). Data as of October 14, 2026.
Lead: 9 in 10 homes tested came in at or below 5 ppb, at or below EPA's 15 ppb action level (latest EPA result for a testing period that ran on or after July 1, 2021: Jan 1, 2021–Dec 31, 2023). This is one number for the whole water system, from homes the utility tested. It isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 2.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does Dubuque Water Works use chloramine?
We didn't find chloramine in Dubuque Water Works's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.