B78/100
THAYER PWS — Water Quality Report 2026
Serving 2,200 people · Missouri
Water Source
Groundwater
County
—
System ID
MO4010788
Violations
15
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023 – November 1, 2023Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2022 – November 30, 2022Enforcement: 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 THAYER PWS
Is THAYER PWS water safe to drink?
THAYER PWS water receives a grade of B (78/100), 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 THAYER PWS detected?
1 contaminants were tested in THAYER PWS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does THAYER PWS have any EPA violations?
Yes, THAYER PWS has 15 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, TT. 1 are health-based violations.
How many people does THAYER PWS serve?
THAYER PWS serves approximately 2,200 people, Missouri. The system provides water to 1 community: Thayer.
What type of water does THAYER PWS provide?
THAYER PWS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MO4010788.
How does THAYER PWS compare to other utilities in Missouri?
THAYER PWS scores 78/100 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.