Water Quality in Grain Valley, MO: 1 Violation — Grade C
Grade C · Score 65/100 · 2 water systems · Updated 2026-05-03
Grain Valley's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Looking at EPA compliance data for Grain Valley, MO, the record shows 1 violation — findings that span health-based exceedances, monitoring lapses, and enforcement events tied to local utilities in the SDWIS database.
Water Quality by ZIP Code in Grain Valley
Water quality varies across Grain Valley's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 64029 | C | 65 | 1 | 0 | View report → |
Water Quality Overview
Grain Valley, Missouri receives a water quality grade of C with an overall score of 65 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 2 water systems serving Grain Valley have accumulated 1 EPA violations (all monitoring/reporting type). These violations are tracked across 1 ZIP codes serving approximately 18,530 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Grain Valley's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
The average 90th percentile lead level across Grain Valley water systems is 0.0015 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
Radon Risk
Grain Valley 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 Grain Valley
Grain Valley is served by 2 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 18,530 people across 1 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
How to Check Your Water in Grain Valley
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
Grain Valley vs. Nearby Missouri Cities
How Grain Valley's water quality compares to similar cities in Missouri:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Grain Valley | C | 1 | 2 | 18,530 |
| Kearney | C | 3 | 3 | 18,655 |
| Macon | B | 0 | 2 | 18,354 |
| Doe Run | D | 0 | 1 | 18,217 |
Common Questions About Grain Valley Water
These are the most common questions residents search for about water quality in Grain Valley, Missouri:
Is Grain Valley water hard or soft? Water hardness varies by source. Grain Valley's 2 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Grain Valley tap water? Grain Valley's water receives a grade of C (65/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Grain Valley? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Grain Valley vs. Missouri Average
Understanding how Grain Valley 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 Grain Valley.
ZIP Codes in Grain Valley
Grain Valley spans 1 ZIP code. The ZIP with the lowest water quality score is 64029. 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.