St Louis City Public Water System
EPA ID: MO6010715 · 304,709 people served · 31 ZIP codes
ZipCheckup's reading of EPA records for St Louis City Public Water System (MO6010715): 2 violations recorded with unresolved status in the SDWIS data used. Open violations at St Louis City Public Water System number 2 in the EPA compliance data, for a system that serves about 304,709 people. An open status describes how each violation is logged in the federal record; it is not a measurement of what comes out of any individual tap.
Data: EPA SDWIS
Service Area Map
Coverage area for St Louis City Public Water System Source: EPA SDWIS service area boundaries.
Service area boundary - average Home Safety grade of mapped ZIPs: B
Demographics of ZIP Codes Served
The ZIP codes associated with St Louis City Public Water System have a median household income of $57,101 and about 577,136 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 87% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: On average, 40% of census tracts in the counties mapped to this service area are designated disadvantaged by the federal Climate and Economic Justice Screening Tool (CEJST, 2022 version). Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
🌊 Where Does Your Water Come From?
St Louis City Public Water System's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Superfund Proximity Note: This service area ranks in the 75th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 13 detections recorded.
Comparable Water Systems
Similar-sized systems in Missouri
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
St Louis City Public Water System (EPA ID: MO6010715) is a community water system in Missouri that serves approximately 304,709 people from surface water sources.
This system provides water to 31 ZIP codes across 1 community.
ZIP-Area Home Safety Context: B (71/100)
This is the average Home Safety Score for 19 of 31 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.
Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.
Violation History
Status breakdown for accepted records with record years 2021-2026: 6 resolved, 0 archived, 0 addressed, and 2 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 |
|---|---|---|---|
| December 30, 2025 | Lead and Copper Rule | Non-health-based | Unaddressed (current) |
| July 2, 2025 | LEAD AND COPPER RULE REVISIONS | Non-health-based | Unaddressed (current) |
| October 1, 2022 | Simazine | Non-health-based | Resolved |
| October 1, 2022 | Atrazine | Non-health-based | Resolved |
| October 1, 2022 | LASSO | Non-health-based | Resolved |
| July 1, 2022 | Simazine | Non-health-based | Resolved |
| July 1, 2022 | Atrazine | Non-health-based | Resolved |
| July 1, 2022 | LASSO | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Simazine | Other Violation | 2 | No |
| Atrazine | Monitoring & Reporting | 2 | No |
| LASSO | Other Violation | 2 | No |
| Lead and Copper Rule | Monitoring & Reporting | 1 | No |
| LEAD AND COPPER RULE REVISIONS | Monitoring & Reporting | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0018 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
31 of 31 ZIP records with known zones are in EPA Radon Zone 2.
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 MO or modeled from parcel and building-footprint data.
This system serves 31 ZIP codes:
63101 · 63102 · 63103 · 63104 · 63105 63106 · 63107 · 63108 · 63109 · 63110 63111 · 63112 · 63113 · 63115 · 63116 63117 · 63118 · 63119 · 63120 · 63121 63123 · 63125 · 63130 · 63133 · 63136 63137 · 63138 · 63139 · 63143 · 63147 63155
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for St Louis City Public Water System (MO6010715) on EPA.gov.
Frequently Asked Questions
Is St Louis City Public Water System water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 2 current noncompliance records and zero current records classified as health-based. That classification is not a property-specific water test or safety guarantee.
How many people does St Louis City Public Water System serve?
St Louis City Public Water System serves approximately 304,709 people across 31 ZIP codes in Missouri.
Where does St Louis City Public Water System get its water?
The primary water source is surface water.
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 →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). St Louis City Public Water System (MO): 8 EPA Violations. https://zipcheckup.com/water-system/mo6010715/
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title = {{St Louis City Public Water System (MO): 8 EPA Violations}},
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url = {https://zipcheckup.com/water-system/mo6010715/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
St Louis City Public Water System (EPA ID: MO6010715) - request the latest Consumer Confidence Report or ask about specific contaminants.