C49/100
CROOKS — Water Quality Report 2026
Serving 1,362 people · South Dakota
Water Source
Purchased Groundwater
County
—
System ID
SD4600391
Violations
48
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 1999.
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 CROOKS
Is CROOKS water safe to drink?
CROOKS water receives a grade of C (49/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 48 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CROOKS detected?
1 contaminants were tested in CROOKS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CROOKS have any EPA violations?
Yes, CROOKS has 48 EPA violation(s) on record, with the most recent in 1999. Violation types include MR, Other.
How many people does CROOKS serve?
CROOKS serves approximately 1,362 people, South Dakota. The system provides water to 1 community: Crooks.
What type of water does CROOKS provide?
CROOKS sources its water from purchased groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is SD4600391.
How does CROOKS compare to other utilities in South Dakota?
CROOKS scores 49/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our South Dakota state page for a full comparison of water systems.