A80/100
PIERRE — Water Quality Report 2026
Serving 14,091 people · South Dakota
Water Source
Surface Water
County
—
System ID
SD4600242
Violations
6
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.92 mg/L | 1.30 mg/L | Over Limit |
manganese | 2400.00 µg/L | — | Above Goal |
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 2008.
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 PIERRE
Is PIERRE water safe to drink?
PIERRE water receives a grade of A (80/100), which is considered excellent. Out of 74 contaminants tested, 1 exceed EPA legal limits. 3 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has PIERRE detected?
74 contaminants were tested in PIERRE's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile), manganese. 1 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does PIERRE have any EPA violations?
Yes, PIERRE has 6 EPA violation(s) on record, with the most recent in 2008. Violation types include MR.
How many people does PIERRE serve?
PIERRE serves approximately 14,091 people, South Dakota. The system provides water to 1 community: Pierre.
What type of water does PIERRE provide?
PIERRE sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is SD4600242.
How does PIERRE compare to other utilities in South Dakota?
PIERRE scores 80/100 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.