County · Iowa

Dubuque County, Iowa: drinking water records

Name: Drinking water records for Dubuque County, Iowa
Creator: U.S. Environmental Protection Agency
License: https://www.usa.gov/government-works

Explore EPA records for 32 community water systems across 13 ZIP codes in Dubuque County, then find water-testing resources and available recent monitoring-station readings.

In focus32Community water systems

Public records. Clearer context.

Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages

Drinking-water records

EPA survey and compliance records are historical reports. UCMR 5 results are available for 3 of the 32 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.

systems in EPA's PFAS survey

systems where PFAS was found

systems at or above the PFOA or PFOS limit, on the yearly-average basis EPA uses

systems that have reached the lead action level

systems with a health-based violation since 2016

System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.

Water systems in this county

All 32 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.

Water system	People served	PFAS survey results	PFAS found	Health-based violations	Lead, 9 in 10 homes at or below
Dubuque Water Works IA3126052	59,667	60	2	0	5 ppbbelow the action level
Asbury Municipal Water System IA3102001	5,943	240	0	0	0 ppbbelow the action level
Dyersville Municipal Water Co IA3130091	4,477	120	0	0	1.7 ppbbelow the action level
Table Mound Park IA3100600	455	0	0	1	0 ppbbelow the action level
Cascade Municipal Water Supply IA3118080	2,386	0	0	0	0 ppbbelow the action level
Peosta Water Supply IA3170001	2,278	0	0	0	0.5 ppbbelow the action level
Epworth Water Supply IA3133033	2,023	0	0	0	3.9 ppbbelow the action level
Farley Water Supply IA3135018	1,766	0	0	0	1.3 ppbbelow the action level
Alpine Park IA3126605	932	0	0	0	4.6 ppbbelow the action level
Terrace Heights IA3126604	548	0	0	0	0 ppbbelow the action level
New Vienna Water Supply IA3165014	382	0	0	0	0 ppbbelow the action level
Worthington Water Supply IA3189001	382	0	0	0	0 ppbbelow the action level
Holy Cross Water Supply IA3146055	356	0	0	0	0 ppbbelow the action level
Burds Green Acres Subdivision IA3170302	312	0	0	0	2 ppbbelow the action level
Thunder Hills Home & Utility Assoc. IA3170335	300	0	0	0	4.6 ppbbelow the action level
Luxemburg Water Supply IA3158001	245	0	0	0	0.8 ppbbelow the action level
Super 20 Mobile Home Court IA3126603	236	0	0	0	0 ppbbelow the action level
Spring Valley Park IA3100606	180	0	0	0	0 ppbbelow the action level
Hickory Acres IA3126304	115	0	0	0	4.8 ppbbelow the action level
Bernard Water System IA3113001	114	0	0	0	1.0 ppbbelow the action level
Star Water IA3126316	110	0	0	0	0 ppbbelow the action level
Lost Canyon MHP (Peosta) IA3100608	97	0	0	0	12.4 ppbbelow the action level
Quality Water, INC. #2 (K-L) IA3126303	70	0	0	0	1 ppbbelow the action level
Lore Mound Mobile Home Park IA3100601	68	0	0	0	4 ppbbelow the action level
Lore Oaks Homeowners Assn. IA3126306	64	0	0	0	2.4 ppbbelow the action level
Gavin Estates IA3100823	52	0	0	0	0 ppbbelow the action level
North End Mobile Home Park IA3100609	40	0	0	0	0 ppbbelow the action level
Country Hills Water Corp IA3122301	38	0	0	0	5 ppbbelow the action level
Shagbark Estates IA3126345	38	0	0	0	0.8 ppbbelow the action level
Green Brier Subdivision IA3126307	35	0	0	0	0 ppbbelow the action level
Regency West Subdivision IA3126308	34	0	0	0	2.7 ppbbelow the action level
Ace Mobile Home Park IA3100629	32	0	0	0	0 ppbbelow the action level

USGS · Monitoring stations

The water, more recently.

Available station readings in Dubuque County, Iowa. Each measurement keeps its time, unit and original source.

These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.

Recent observations load when this section comes into view.

How these readings update

We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.

Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.

Your next step

Water testing, reports & local help.

Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.

Official national directories

Water testing

Find your state’s private-well program

EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-05

Water testing

Find a certified drinking-water laboratory

Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-11

Public records

Find your utility’s Consumer Confidence Report

EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-09-09

Public records

Explore USGS water observations

Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.

U.S. Geological Survey
Source reviewed 2026-09-15

A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.

Understand water testing and laboratory reports

Resource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction

Explore your area

Local coverage in Dubuque County

13ZIP areas in this overview

Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.

Towns and communities

Bernard
Dubuque
Epworth
Farley
Luxemburg
New Vienna
North Buena Vista
Peosta
Rickardsville
Sherrill
Worthington

Explore water-system records Find water-testing resources

View ZIP areas and understand coverage

52001Dubuque
52002Dubuque
52003Dubuque
52032Bernard
52039Rickardsville
52045Epworth
52046Farley
52053North Buena Vista
52056Luxemburg
52065New Vienna
52068Peosta
52073Sherrill
52078Worthington

These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.

Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.

Beyond this county page

Keep reading. Compare nearby.

PFASChoosing a PFAS filterPFAS was found in 1 of the 3 systems EPA surveyed here. See how to check a filter’s certified PFAS reduction.LeadChoosing a lead filter10 systems here have reached the lead action level. See how to check a filter’s lead-reduction certification.Your utilityFind your annual water reportConfirm the supplier on your bill, then read its Consumer Confidence Report for local results.

Counties near Dubuque County

All Iowa counties

Sources and scope

EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.

Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.

Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.