B67/100
KNOB NOSTER PWS — Water Quality Report 2026
Serving 2,863 people · Missouri
Water Source
Groundwater
County
—
System ID
MO1010432
Violations
26
Contaminant Test Results
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
Frequently Asked Questions About KNOB NOSTER PWS
Is KNOB NOSTER PWS water safe to drink?
KNOB NOSTER PWS water receives a grade of B (67/100), which is considered good. Out of 1 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has KNOB NOSTER PWS detected?
1 contaminants were tested in KNOB NOSTER PWS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does KNOB NOSTER PWS have any EPA violations?
Yes, KNOB NOSTER PWS has 26 EPA violation(s) on record, with the most recent in 2023. Violation types include MON, MR, MCL. 1 are health-based violations.
How many people does KNOB NOSTER PWS serve?
KNOB NOSTER PWS serves approximately 2,863 people, Missouri. The system provides water to 1 community: Knob Noster.
What type of water does KNOB NOSTER PWS provide?
KNOB NOSTER PWS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MO1010432.
How does KNOB NOSTER PWS compare to other utilities in Missouri?
KNOB NOSTER PWS scores 67/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Missouri state page for a full comparison of water systems.