Water Quality in Ballwin, MO: No Violations - Grade D
Grade D · Score 40/100 · 6 water systems · Updated 2026-07-18
Ballwin's water has significant violations. Water testing and filtration are recommended.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-07-18
EPA compliance data for Ballwin, MO covers 6 water systems and returns the same result across every reporting period on file: zero violations documented, zero enforcement initiated, zero health-based findings registered anywhere in the federal dataset.
Water Quality by ZIP Code in Ballwin
Water quality varies across Ballwin's 4 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 63011 | D | 40 | 0 | 0 | View report → |
| 63021 | D | 40 | 0 | 0 | View report → |
| 63022 | D | 40 | 0 | 0 | View report → |
| 63024 | D | 40 | 0 | 0 | View report → |
Violation Trend
EPA violations recorded for water systems serving Ballwin.
Water Quality Overview
Ballwin, Missouri receives a water quality grade of D with an overall score of 40 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
No EPA violations have been recorded for the 6 water systems serving Ballwin. This is a positive indicator, though it does not guarantee the absence of all contaminants - some substances (like PFAS) are not yet fully regulated.
What Grade D Means
A grade of D indicates significant compliance issues. Ballwin's water systems have accumulated violations that suggest ongoing water quality challenges. Residents should check their specific ZIP code report and consider water testing or filtration.
Lead Levels
Lead testing data for Ballwin is currently being collected. The EPA requires all community water systems to test for lead under the Lead and Copper Rule.
With 66% of homes built before 1986, Ballwin 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.
Radon Risk
Ballwin is in EPA Radon Zone 1 (High risk). The EPA recommends all homes in Zone 1 areas be tested for radon. Radon is the second leading cause of lung cancer after smoking.
Water Systems Serving Ballwin
Ballwin is served by 6 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 92,571 people across 4 ZIP codes.
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
The EPA has taken 16 enforcement actions against water systems serving Ballwin. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Ballwin
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
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
Violation Trend Over Time
Year-by-year EPA violations recorded for water systems serving Ballwin:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2023 | 1 | 1 |
| 2024 | 2 | 2 |
Violations have increased from 1 in 2023 to 2 in 2024. This trend warrants monitoring.
EPA Enforcement History
The EPA and state regulators have taken 12 enforcement actions against water systems serving Ballwin. Recent actions:
| Date | Action Type |
|---|---|
| 2025-03-14 | State Order Extension |
| 2025-01-07 | State Informal Action |
| 2024-12-04 | State Filed Judgment |
| 2024-12-04 | State Informal Enforcement |
| 2024-11-25 | State Order Extension |
| 2024-11-06 | State Filed Judgment |
| 2024-10-22 | State Informal Action |
| 2024-09-23 | State Order Extension |
| 2024-09-03 | State Filed Judgment |
| 2024-09-03 | State Informal Enforcement |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-03-14.
Ballwin vs. Nearby Missouri Cities
How Ballwin's water quality compares to similar cities in Missouri:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Ballwin | D | 0 | 6 | 92,571 |
| O Fallon | C | 12 | 8 | 100,311 |
| Saint Joseph | D | 0 | 7 | 82,702 |
| Lees Summit | C | 42 | 9 | 109,974 |
Water Quality by ZIP Code in Ballwin
Water quality varies across Ballwin's ZIP codes. The table below shows the worst-scoring and best-scoring areas:
| ZIP Code | Score | Grade | Violations | Health-Based |
|---|---|---|---|---|
| 63011 | 40 | D | 0 | 0 |
| 63021 | 40 | D | 0 | 0 |
| 63022 | 40 | D | 0 | 0 |
| 63024 | 40 | D | 0 | 0 |
Common Questions About Ballwin Water
These are the most common questions residents search for about water quality in Ballwin, Missouri:
Is Ballwin water hard or soft? Water hardness varies by source. Ballwin's 6 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Ballwin tap water? Ballwin's water receives a grade of D (40/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Ballwin? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Ballwin vs. Missouri Average
Understanding how Ballwin 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 Ballwin.
ZIP Codes in Ballwin
Ballwin spans 4 ZIP codes. Each ZIP code has its own water quality profile based on the specific water system serving that area. 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
Updated daily.