Spearfish, South Dakota Water Quality Report
Water quality data for 19 water systems serving 14,026 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (4)
45
Oct 31, 2025
71
Jul 1, 2025
71
Jul 1, 2024
71
Jul 1, 2023
Resolved Violations (496)
3A
Mar 1, 2025 — Mar 31, 2025
3A
Mar 1, 2025 — Mar 31, 2025
3A
Feb 1, 2025 — Feb 28, 2025
3A
Feb 1, 2025 — Feb 28, 2025
4G
Oct 17, 2024
+ 491 more resolved violations
Frequently Asked Questions
Is Spearfish tap water safe to drink?
Spearfish's water meets all EPA maximum contaminant levels. However, 0 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Spearfish tap water?
0 contaminants have been detected in Spearfish's water supply across 19 water systems. See the full contaminant table above for details.
How can I improve my water quality in Spearfish?
Install a water filter rated for the specific contaminants found in Spearfish's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Spearfish have any water quality violations?
Yes, Spearfish currently has 84 active violations. See the violations section above for details.