Spearfish, South Dakota: Is the Tap Water Safe to Drink?
2026 EPA water quality data for 28 community water systems serving 15,828+ residents. See violations, PFAS results, lead test results, and safety grades — free.
Is Spearfish Tap Water Safe to Drink?
27 of 28 tested water systems in Spearfish meet federal drinking water standards with no active violations. 1 system has 1 active health-based violation — check individual reports below for details.
Spearfish Water Quality Overview
Spearfish, South Dakota is served by 28 community water systems providing water to approximately 15,828 residents. These systems draw from groundwater (27), groundwater purchased (1) sources. 1 active health-based violation across Spearfish water systems require attention. Including monitoring and reporting violations, there are 236 total violations on record.
Find Your Water System
Search by ZIP code to find your exact water provider and see its full EPA report.
All 28 water systems in Spearfish
Looking for water quality data across the whole state? See our full South Dakota tap water safety report covering South Dakota’s EPA-regulated water systems.
Spearfish Drinking Water: Frequently Asked Questions
Is Spearfish, South Dakota tap water safe to drink?
27 of 28 tested water systems in Spearfish meet federal drinking water standards with no active violations. 1 system has 1 active health-based violation — check individual reports below for details.
How many water utilities serve Spearfish, South Dakota?
28 community water systems serve Spearfish, South Dakota, providing water to approximately 15,828 people. Different neighborhoods may be served by different utilities. Enter your ZIP code at the top to find your specific provider.
Does Spearfish tap water have lead?
Lead in drinking water typically enters from old pipes and fixtures inside homes and buildings, not from the treatment plant. The EPA requires water systems to monitor for lead under the Lead and Copper Rule. Click any water system above to see its most recent 90th-percentile lead test results. Homes built before 1986 are most likely to have lead plumbing components.
What contaminants have been found in Spearfish drinking water?
EPA violation records for Spearfish water systems are listed on each utility's report page. Common regulated contaminants include disinfection byproducts (TTHMs, HAA5), coliform bacteria, nitrates, and lead. Click any utility above to see its full violation history going back 10 years.
How do I find out which water company serves my address in Spearfish?
Enter your Spearfish ZIP code in the search box at the top of this page. ClearWater will identify the specific water system serving your area and show you its EPA violation history, lead test results, and an overall safety grade. You can also check your water bill or your utility's annual Consumer Confidence Report (CCR).