B67/100
Knob Noster Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 2,863 residents · Missouri
What's In Knob Noster's Tap Water?
1
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: March 1, 2023 – March 31, 2023Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
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
KNOB NOSTER PWS
Population Served
2,863
Water Source
Groundwater
System ID
MO1010432
Frequently Asked Questions About Knob Noster Water
Is Knob Noster tap water safe to drink?
Knob Noster, Missouri tap water receives a grade of B (67/100), which is considered good. Out of 1 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 Knob Noster's water?
Of the 1 contaminants tested in Knob Noster'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 Knob Noster have any water quality violations?
Yes, Knob Noster has 26 EPA violation(s) on record, with the most recent in 2023. Violation types include MON, MR, MCL. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in Knob Noster?
Knob Noster 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 Knob Noster's tap water come from?
Knob Noster's drinking water is sourced from groundwater and supplied by KNOB NOSTER PWS. The system serves approximately 2,863 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Knob Noster'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. Knob Noster'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 Knob Noster's water compare to other cities in Missouri?
Knob Noster's water quality score of 67/100 earns a grade of B, which is considered good. This is an above-average score compared to many cities nationwide. Visit our Missouri state page to see how all cities in the state compare.
What should I do if I'm concerned about Knob Noster's water quality?
If you have concerns about Knob Noster'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 (KNOB NOSTER 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.