Water Quality in Marthasville, MO: 57 Violations Recorded for Mapped Water Systems
5 water systems · 1 directly mapped ZIP records
Available EPA records report 57 violations across 1 directly mapped ZIP records with known counts for Marthasville. This is compliance evidence, not a property-level tap-water verdict.
Data: EPA Safe Drinking Water Information System (SDWIS)
Water Quality by ZIP Code in Marthasville
This table shows typed EPA water evidence only. Missing violation counts are displayed as N/A, not zero.
| ZIP Code | Violations | Health | |
|---|---|---|---|
| 63357 | 57 | 1 | View report → |
Water Quality Overview
Marthasville, Missouri has directly mapped EPA water-system data for 1 ZIP codes. This page reports typed compliance facts and does not relabel the multi-source Home Safety Score as a drinking-water grade.
The available EPA records report 57 violations, including 1 health-based violation across 1 directly mapped ZIP record with reported counts.
Lead Levels
The average of the reported 90th-percentile lead results across the ZIP codes of Marthasville is 0.0039 mg/L; the EPA action level of 0.015 mg/L applies to a water system's own 90th-percentile result and is not a safety threshold (EPA's health goal for lead is zero). No exceedances appear among the 1 ZIP records with known lead status.
With 49% of homes built before 1986, Marthasville has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.
Water Systems Serving Marthasville
Marthasville is served by 5 community water systems regulated under the Safe Drinking Water Act. About 6,593 people live in the area (1 ZIP code, Census); this is not the systems' reported service population.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
EPA records list enforcement actions against water systems serving Marthasville. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Marthasville
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels and violation history
Request your CCR - your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test - certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration - NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories - monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Marthasville Water Systems
The following contaminants have been detected or caused violations across Marthasville's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Lead and Copper Rule Revisions | Treatment Technique | N/A | 4 | 1 | No |
| Consumer Confidence Rule | Reporting | N/A | 3 | 1 | No |
| 1,2,4-Trichlorobenzene | Organic | N/A | 2 | 1 | No |
| cis-1,2-Dichloroethylene | Organic | N/A | 2 | 1 | No |
| Xylenes, Total | Organic | N/A | 2 | 1 | No |
| Dichloromethane | Organic | N/A | 2 | 1 | No |
| o-Dichlorobenzene | Organic | N/A | 2 | 1 | No |
| p-Dichlorobenzene | Organic | N/A | 2 | 1 | No |
| Vinyl chloride | Organic | N/A | 2 | 1 | No |
| 1,1-Dichloroethylene | Organic | N/A | 2 | 1 | No |
| trans-1,2-Dichloroethylene | Organic | N/A | 2 | 1 | No |
| 1,2-Dichloroethane | Organic | N/A | 2 | 1 | No |
| 1,1,1-Trichloroethane | Organic | N/A | 2 | 1 | No |
| Carbon tetrachloride | Organic | N/A | 2 | 1 | No |
| 1,2-Dichloropropane | Organic | N/A | 2 | 1 | No |
The standard column shows the EPA Maximum Contaminant Level (MCL) except for lead and copper, whose value is an action level that triggers corrective steps and is not an MCL. Health-based violations are MCL, MRDL and treatment-technique violations.
EPA Enforcement History
The EPA and state regulators have taken enforcement actions against water systems serving Marthasville. Recent actions:
| Date | Action Type |
|---|---|
| 2026-03-18 | State Informal Action |
| 2026-03-18 | State Informal Enforcement |
| 2025-10-22 | State Informal Action |
| 2025-10-22 | State Informal Enforcement |
| 2025-09-03 | State Order Extension |
| 2025-08-22 | State Informal Action |
| 2025-07-21 | State Informal Action |
| 2025-07-21 | State Informal Enforcement |
| 2025-05-20 | State Informal Action |
| 2025-03-14 | State Informal Action |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2026-03-18.
Marthasville vs. Nearby Missouri Cities
How Marthasville's water quality compares to similar cities in Missouri:
| City | Direct EPA ZIPs | Violations | Systems | Population |
|---|---|---|---|---|
| Marthasville | 1 | 57 | 5 | 6,593 |
| New Haven | 1 | 6 | 3 | 6,581 |
| Butler | 1 | 38 | 5 | 6,550 |
| Knob Noster | 1 | 12 | 5 | 6,527 |
Common Questions About Marthasville Water
These are the most common questions residents search for about water quality in Marthasville, Missouri:
Is Marthasville water hard or soft? Water hardness varies by source. Marthasville's 5 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Marthasville tap water? City-level EPA records cannot determine safety at a specific tap. The measured subset contains 1 health-based violation; check the affected utility record and consider certified testing.
What is the best water filter for Marthasville? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Marthasville vs. Missouri Average
Understanding how Marthasville compares to the broader Missouri average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below - water quality can vary significantly even within Marthasville.
ZIP Codes in Marthasville
Marthasville spans 1 ZIP code. EPA water-system coverage is available for 1 directly mapped ZIP code. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Source reporting periods vary. See each cited source for its publication schedule.