A87/100
LINCOLN COUNTY RURAL WATER SYSTEM — Water Quality Report 2026
Serving 5,965 people · South Dakota
Water Source
Purchased Groundwater
County
—
System ID
SD4600304
Violations
2
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.63 mg/L | 1.30 mg/L | Over Limit |
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
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2024 – June 30, 2024Rule: Stage 1 DBPREnforcement: 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 LINCOLN COUNTY RURAL WATER SYSTEM
Is LINCOLN COUNTY RURAL WATER SYSTEM water safe to drink?
LINCOLN COUNTY RURAL WATER SYSTEM water receives a grade of A (87/100), which is considered excellent. Out of 32 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has LINCOLN COUNTY RURAL WATER SYSTEM detected?
32 contaminants were tested in LINCOLN COUNTY RURAL WATER SYSTEM's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does LINCOLN COUNTY RURAL WATER SYSTEM have any EPA violations?
Yes, LINCOLN COUNTY RURAL WATER SYSTEM has 2 EPA violation(s) on record, with the most recent in 2024. Violation types include MR.
How many people does LINCOLN COUNTY RURAL WATER SYSTEM serve?
LINCOLN COUNTY RURAL WATER SYSTEM serves approximately 5,965 people, South Dakota. The system provides water to 1 community: Sioux Falls.
What type of water does LINCOLN COUNTY RURAL WATER SYSTEM provide?
LINCOLN COUNTY RURAL WATER SYSTEM sources its water from purchased groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is SD4600304.
How does LINCOLN COUNTY RURAL WATER SYSTEM compare to other utilities in South Dakota?
LINCOLN COUNTY RURAL WATER SYSTEM scores 87/100 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.