A87/100
BROWN-DAY-MARSHALL RWS — Water Quality Report 2026
Serving 5,673 people · South Dakota
Water Source
Groundwater
County
—
System ID
SD4600882
Violations
2
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.76 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2011.
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 BROWN-DAY-MARSHALL RWS
Is BROWN-DAY-MARSHALL RWS water safe to drink?
BROWN-DAY-MARSHALL RWS 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 BROWN-DAY-MARSHALL RWS detected?
32 contaminants were tested in BROWN-DAY-MARSHALL RWS's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does BROWN-DAY-MARSHALL RWS have any EPA violations?
Yes, BROWN-DAY-MARSHALL RWS has 2 EPA violation(s) on record, with the most recent in 2011. Violation types include MR, Other.
How many people does BROWN-DAY-MARSHALL RWS serve?
BROWN-DAY-MARSHALL RWS serves approximately 5,673 people, South Dakota. The system provides water to 1 community: Britton.
What type of water does BROWN-DAY-MARSHALL RWS provide?
BROWN-DAY-MARSHALL RWS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is SD4600882.
How does BROWN-DAY-MARSHALL RWS compare to other utilities in South Dakota?
BROWN-DAY-MARSHALL RWS 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.