Maquoketa Municipal Water
EPA ID: IA4950029 · 6,128 people served · 2 ZIP codes
ZipCheckup's reading of EPA records for Maquoketa Municipal Water (IA4950029): 1 violation recorded with unresolved status in the SDWIS data used. Maquoketa Municipal Water | open status in EPA data: 1 violation | people served: about 6,128.
Data: EPA SDWIS
Service Area Map
Coverage area for Maquoketa Municipal Water Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Maquoketa Municipal Water have a median household income of $75,445 and about 9,153 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 79% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Maquoketa Municipal Water's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Wastewater Proximity Note: This service area ranks in the 60th percentile nationally for proximity to wastewater discharge points.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Iowa
System Overview
Maquoketa Municipal Water (EPA ID: IA4950029) is a community water system in Iowa that serves approximately 6,128 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Status breakdown for accepted records with record years 2021-2026: 0 resolved, 0 archived, 0 addressed, and 1 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| September 2, 2025 | Public Notice | Non-health-based | Unaddressed (current) |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Public Notice | Other (notice or report rule) | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0071 mg/L | No | 2025-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
2 of 2 ZIP records with known zones are in EPA Radon Zone 1.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by IA or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Maquoketa Municipal Water (IA4950029) on EPA.gov.
Frequently Asked Questions
Is Maquoketa Municipal Water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 1 current noncompliance record and zero current records classified as health-based. That classification is not a property-specific water test or safety guarantee.
How many people does Maquoketa Municipal Water serve?
Maquoketa Municipal Water serves approximately 6,128 people across 2 ZIP codes in Iowa.
Where does Maquoketa Municipal Water get its water?
The primary water source is groundwater.
Federal UCMR5 PFAS Monitoring: No PFAS Reported Above Reporting Levels
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were reported above UCMR5 minimum reporting levels.
EPA's April 2024 PFAS rule sets MCLs of 4 ppt for PFOA and PFOS and 10 ppt for PFHxS, PFNA and HFPO-DA (GenX); water systems must comply from 2029. Other PFAS compounds have no individual federal MCL. A state standard is shown only where this system's state has its own enforceable PFAS limit. Detection results are EPA UCMR5 samples, not a measurement at your tap.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
- #24 / 24 Highest Exposure Burden (Iowa)
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Maquoketa Municipal Water (IA): 1 EPA Violation. https://zipcheckup.com/water-system/ia4950029/
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url = {https://zipcheckup.com/water-system/ia4950029/}
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What You Can Do
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Check your specific ZIP code
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Contact your utility
Maquoketa Municipal Water (EPA ID: IA4950029) - request the latest Consumer Confidence Report or ask about specific contaminants.