Water Quality in DUBUQUE, IA (52003)

EPA violation data for public water systems serving ZIP code 52003.

136

Total Violations

Health-Based

136

Monitoring / Reporting

127

Resolved

What does this mean?

127 of 136 violations have been resolved. None of these are health-based violations — no contaminant levels exceeded federal safety limits. The remaining 136 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.

Water systems: 25 Population served: 3,829

Violations Detail (136 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
Public Notice	Monitoring	N/A	N/A	Sep 21, 2025	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jun 23, 2025	Active	N/A
Public Notice	Monitoring	N/A	N/A	Jun 23, 2025	Active	N/A
Public Notice	Monitoring	N/A	N/A	Jun 23, 2025	Active	N/A
Public Notice	Monitoring	N/A	N/A	May 23, 2025	Active	N/A
Public Notice	Monitoring	N/A	N/A	May 23, 2025	Active	N/A
Public Notice	Monitoring	N/A	N/A	May 23, 2025	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Mar 22, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Mar 22, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Mar 22, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Mar 22, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jan 20, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jan 20, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jan 20, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jan 20, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 22, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 22, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 22, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 22, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Nov 30, 2024	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Nitrate	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Public Notice	Monitoring	N/A	N/A	Sep 22, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Sep 22, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Sep 22, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Sep 22, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Feb 23, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Feb 23, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Feb 23, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Feb 23, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 23, 2023	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 23, 2023	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 23, 2023	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 23, 2023	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Oct 23, 2023	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Oct 23, 2023	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Oct 23, 2023	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Oct 23, 2023	Resolved	N/A
Nitrate	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
E. COLI	Monitoring	0	N/A	Aug 11, 2023	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Aug 11, 2023	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Aug 11, 2023	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Aug 11, 2023	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Jun 12, 2023	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Jun 12, 2023	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Jun 12, 2023	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Jun 12, 2023	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2022	Resolved	N/A
Nitrate	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jul 24, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jul 24, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jul 24, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jul 24, 2022	Resolved	N/A
E. COLI	Monitoring	0	N/A	May 16, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	May 16, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	May 16, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	May 16, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2022	Resolved	N/A
Nitrate	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Lead and Copper Rule	Monitoring	N/A	N/A	Nov 30, 2021	Active	N/A
Public Notice	Monitoring	N/A	N/A	Oct 22, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Oct 22, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Oct 22, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Nitrate	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A

Lead & Copper Levels

Violation Timeline

2025(22)

Public Notice

Sep 21Active

Revised Total Coliform Rule

Aug 31Resolved

Public Notice

Jun 23Active

Public Notice

Jun 23Active

Public Notice

Jun 23Active

Public Notice

May 23Active

Public Notice

May 23Active

Public Notice

May 23Active

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Public Notice

Mar 22Resolved

Public Notice

Mar 22Resolved

Public Notice

Mar 22Resolved

Public Notice

Mar 22Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Public Notice

Jan 20Resolved

Public Notice

Jan 20Resolved

Public Notice

Jan 20Resolved

Public Notice

Jan 20Resolved

2024(29)

Revised Total Coliform Rule

Dec 31Resolved

Revised Total Coliform Rule

Dec 31Resolved

Revised Total Coliform Rule

Dec 31Resolved

Public Notice

Dec 22Resolved

Public Notice

Dec 22Resolved

Public Notice

Dec 22Resolved

Public Notice

Dec 22Resolved

Lead and Copper Rule

Nov 30Active

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Nitrate

Sep 30Resolved

Public Notice

Sep 22Resolved

Public Notice

Sep 22Resolved

Public Notice

Sep 22Resolved

Public Notice

Sep 22Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Public Notice

Feb 23Resolved

Public Notice

Feb 23Resolved

Public Notice

Feb 23Resolved

Public Notice

Feb 23Resolved

How Does This Compare?

DUBUQUE (52003) has 136 recorded violations, none of which are health-based. 9 remain unresolved. Consider testing your tap water independently for added peace of mind.

Recommended Water Filters

Based on the contaminants detected in your area, these filter types may help improve your water quality.

Reverse Osmosis System

Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.

Targets:Lead, Copper, Arsenic, Mercury, Cadmium

Look for:NSF/ANSI 58 certified

NSF Certified Products → EPA Safe Drinking Water Guide →

UV Water Purifier

Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.

Targets:E. coli, Coliform, Giardia, Cryptosporidium

Look for:NSF/ANSI 55 (Class A) certified

NSF Certified Products → EPA Safe Drinking Water Guide →

Always look for filters certified by NSF International for the specific contaminants you want to remove.

Water Quality in DUBUQUE, IA (52003)

What does this mean?

Violations Detail (136 total)

Lead & Copper Levels

Violation Timeline

2025(22)

2024(29)

2023(29)

2022(28)

2021(28)

How Does This Compare?

Recommended Water Filters

Reverse Osmosis System

UV Water Purifier

Nearby ZIP Codes

Check Another ZIP Code