A83/100
NORTHDALE SANITARY DISTRICT — Water Quality Report 2026
Serving 1,075 people · South Dakota
Water Source
Groundwater
County
—
System ID
SD4600514
Violations
6
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
1
Health-Related
TIER 2Resolved
Violation related to Nitrite
When: February 28, 2024 – July 22, 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 NORTHDALE SANITARY DISTRICT
Is NORTHDALE SANITARY DISTRICT water safe to drink?
NORTHDALE SANITARY DISTRICT water receives a grade of A (83/100), which is considered excellent. 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 NORTHDALE SANITARY DISTRICT detected?
1 contaminants were tested in NORTHDALE SANITARY DISTRICT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does NORTHDALE SANITARY DISTRICT have any EPA violations?
Yes, NORTHDALE SANITARY DISTRICT has 6 EPA violation(s) on record, with the most recent in 2024. Violation types include TT, MR. 2 are health-based violations.
How many people does NORTHDALE SANITARY DISTRICT serve?
NORTHDALE SANITARY DISTRICT serves approximately 1,075 people, South Dakota. The system provides water to 2 communities: Piedmont, Black Hawk.
What type of water does NORTHDALE SANITARY DISTRICT provide?
NORTHDALE SANITARY DISTRICT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is SD4600514.
How does NORTHDALE SANITARY DISTRICT compare to other utilities in South Dakota?
NORTHDALE SANITARY DISTRICT scores 83/100 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.