A88/100
CLAY RURAL WATER SYSTEM — Water Quality Report 2026
Serving 4,780 people · South Dakota
Water Source
Groundwater
County
—
System ID
SD4600626
Violations
5
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
No violations in the past 5 years
Full EPA compliance since 2003.
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 CLAY RURAL WATER SYSTEM
Is CLAY RURAL WATER SYSTEM water safe to drink?
CLAY RURAL WATER SYSTEM water receives a grade of A (88/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CLAY RURAL WATER SYSTEM detected?
31 contaminants were tested in CLAY RURAL WATER SYSTEM's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CLAY RURAL WATER SYSTEM have any EPA violations?
Yes, CLAY RURAL WATER SYSTEM has 5 EPA violation(s) on record, with the most recent in 2003. Violation types include MR, MCL. 1 are health-based violations.
How many people does CLAY RURAL WATER SYSTEM serve?
CLAY RURAL WATER SYSTEM serves approximately 4,780 people, South Dakota. The system provides water to 1 community: Wakonda.
What type of water does CLAY RURAL WATER SYSTEM provide?
CLAY RURAL WATER SYSTEM sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is SD4600626.
How does CLAY RURAL WATER SYSTEM compare to other utilities in South Dakota?
CLAY RURAL WATER SYSTEM scores 88/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our South Dakota state page for a full comparison of water systems.