A83/100
Wentzville Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 41,784 residents · Missouri
What's In Wentzville's Tap Water?
69
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2018.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
WENTZVILLE PWS
Population Served
41,784
Water Source
Groundwater
System ID
MO6010849
Frequently Asked Questions About Wentzville Water
Is Wentzville tap water safe to drink?
Wentzville, Missouri tap water receives a grade of A (83/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 1 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Wentzville's water?
Of the 69 contaminants tested in Wentzville's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Wentzville have any water quality violations?
Yes, Wentzville has 6 EPA violation(s) on record, with the most recent in 2018. Violation types include MON, MCL, MR. 2 of these are health-based violations, which are the most serious category.
Do I need a water filter in Wentzville?
Wentzville water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.
Where does Wentzville's tap water come from?
Wentzville's drinking water is sourced from groundwater and supplied by WENTZVILLE PWS. The system serves approximately 41,784 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Wentzville's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Wentzville's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Wentzville's water compare to other cities in Missouri?
Wentzville's water quality score of 83/100 earns a grade of A, which is considered excellent. This places Wentzville among the better-performing water systems in Missouri. Visit our Missouri state page to see how all cities in the state compare.
What should I do if I'm concerned about Wentzville's water quality?
If you have concerns about Wentzville's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (WENTZVILLE PWS) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.