Mo American St Louis St Charles Counties
EPA ID: MO6010716 · 1,111,000 people served · 61 ZIP codes
ZipCheckup's reading of EPA records for Mo American St Louis St Charles Counties (MO6010716): no drinking-water violations recorded since 2021. Across the monitored periods in available EPA data, Mo American St Louis St Charles Counties has no violations listed for its service population of 1,111,000.
Data: EPA SDWIS
Service Area Map
Coverage area for Mo American St Louis St Charles Counties 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 Mo American St Louis St Charles Counties have a median household income of $84,879 and about 1,580,826 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 71% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Mo American St Louis St Charles Counties'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 71th 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. 55 detections recorded. 2 detections are above the level of a federal PFAS MCL (4 ppt for PFOA and PFOS), with compliance required from 2029.
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
Mo American St Louis St Charles Counties (EPA ID: MO6010716) is a community water system in Missouri that serves approximately 1,111,000 people from surface water sources.
This system provides water to 61 ZIP codes across 21 communities.
ZIP-Area Home Safety Context: B (81/100)
This is the average Home Safety Score for 44 of 61 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
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| Below the reporting limit | 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
61 of 61 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 61 ZIP codes:
63005 · 63010 · 63011 · 63017 · 63021 63025 · 63026 · 63031 · 63033 · 63034 63038 · 63040 · 63042 · 63043 · 63044 63045 · 63049 · 63052 · 63069 · 63074 63088 · 63105 · 63109 · 63112 · 63114 63115 · 63116 · 63117 · 63119 · 63120 63121 · 63122 · 63123 · 63124 · 63125 63126 · 63127 · 63128 · 63129 · 63130 63131 · 63132 · 63133 · 63134 · 63135 63136 · 63137 · 63138 · 63139 · 63140 63141 · 63143 · 63144 · 63146 · 63147 63301 · 63303 · 63304 · 63366 · 63368 63376
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Mo American St Louis St Charles Counties (MO6010716) on EPA.gov.
Frequently Asked Questions
Is Mo American St Louis St Charles Counties water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Mo American St Louis St Charles Counties in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Mo American St Louis St Charles Counties serve?
Mo American St Louis St Charles Counties serves approximately 1,111,000 people across 61 ZIP codes in Missouri.
Where does Mo American St Louis St Charles Counties get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected; the table compares each one with the EPA MCL where one exists (April 2024 rule, compliance required from 2029) and with this state's enforceable standard where one exists.
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.). Mo American St Louis St Charles Counties: Serves 1.1M People. https://zipcheckup.com/water-system/mo6010716/
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