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Tap water quality report

Spearfish

EPA monitoring tested this supplier for 51 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

51
contaminants tested
11
detected
13,803
people served
0
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Local government
Counties served
Lawrence

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

0
health-based violations
19
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2013-01-12
MR Monitoring Resolved 2013-01-12
MR Monitoring Resolved 2013-01-12
MR Monitoring Resolved 2001-01-01 → 2001-12-31
MR Monitoring Resolved 2001-01-01 → 2001-12-31
MR Monitoring Resolved 2001-01-01 → 2001-12-31
MR Monitoring Resolved 2001-01-01 → 2001-12-31
MR Monitoring Resolved 2001-01-01 → 2001-12-31
MR Monitoring Resolved 2001-01-01 → 2001-12-31
MR Monitoring Resolved 2000-11-01 → 2000-11-30

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
231 µg/L 18%
of the EPA limit 1300 µg/L
worst single sample: 340 µg/L
90/90 SYR4 2012–2018
Lead
6 µg/L 40%
of the EPA limit 15 µg/L
worst single sample: 9 µg/L
90/90 SYR4 2012–2018
Nitrate
299 µg/L 3%
of the EPA limit 10000 µg/L
 20/34 SYR4 2017–2019
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2024
TTHM
6.72 µg/L 8.4%
of the EPA limit 80 µg/L
worst single sample: 8.4 µg/L
9/17 SYR4 2012–2019
Barium
191.3 µg/L 9.6%
of the EPA limit 2000 µg/L
worst single sample: 200 µg/L
7/7 SYR4 2012–2018
Gross Alpha, Excl. Radon And U
6.15 pCi/L 41%
of the EPA limit 15 pCi/L
worst single sample: 6.5 pCi/L
6/7 SYR4 2015
Total Haloacetic Acids (HAA5)
0.9265 µg/L 1.5%
of the EPA limit 60 µg/L
worst single sample: 1 µg/L
4/17 SYR4 2012–2019
Arsenic
5 µg/L 50%
of the EPA limit 10 µg/L
 1/7 SYR4 2012–2018
Chromium
3 µg/L 3%
of the EPA limit 100 µg/L
 1/7 SYR4 2012–2018
Fluoride
500 µg/L 13%
of the EPA limit 4000 µg/L
 1/1 SYR4 2012
40 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalBeryllium, TotalCadmiumCombined Radium (-226 And -228)Combined UraniumGross Beta Particle ActivityHfpo-DaMercuryNetfosaaNfdhaNmefosaaNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaSeleniumThallium, TotalLithium

Utility contact

Contact
MILES BURTZLAFF
Phone
6057171170
Email
[email protected]

Frequently asked questions about Spearfish

Is Spearfish tap water safe to drink?

EPA monitoring detected 11 contaminants in Spearfish's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Spearfish's water?

EPA monitoring detected Copper, Lead, Nitrate, Lead, TTHM, and others. The full list with the level and data source for each is above.

How many people does Spearfish serve?

Spearfish reports serving 13,803 people in South Dakota, per its EPA record.

Has Spearfish had any water quality violations?

The EPA has 19 violations on file for Spearfish, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.