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City water profile

Water hardness in Hill City

Find official utility reports, understand hardness, and check the water system serving your home in Hill City, South Dakota.

Utility-reported hardness

Not yet available

Check your provider and source →
State comparison
Unavailable
Evidence comparison rank
—
Matched utilities
3
Active health records
0

Your tap water

What does the utility report?

Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.

Utility hardness unavailable in this index

Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.

Find an official utility report →
Convert a hardness result →Test your tap →

Match the name on your water bill

Your utility’s measurements and compliance records

These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.

EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.

Hill City

SD4600159 · Groundwater · 872 people served system-wide

EPA SDWIS explicitly lists this ZIP in the system's served geography.

No active health-based record in this imported snapshot

Find this utility’s official report →
Measurements (2)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level
Reported level
0.001 mg/L
Action level
0.015 mg/L

7% of the listed benchmark

Monitoring period: Jan 1, 2025 to Dec 31, 2025

Copper (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Above action level
Reported level
1.38 mg/L
Action level
1.3 mg/L

106% of the listed benchmark

Monitoring period: Jan 1, 2023 to Dec 31, 2023

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Hermosa-Old System

SD4600154 · Groundwater · 420 people served system-wide

EPA SDWIS explicitly lists this ZIP in the system's served geography.

No active health-based record in this imported snapshot

Find this utility’s official report →
Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level
Reported level
0.007 mg/L
Action level
0.015 mg/L

47% of the listed benchmark

Monitoring period: Jan 1, 2023 to Dec 31, 2023

Violation history (4)
Imported violation history for Hermosa-Old System
RuleStatusPeriod
Revised Total Coliform RuleResolvedApr 1, 2025 to Apr 30, 2025
Combined UraniumResolvedOct 1, 2021 to Dec 31, 2021
Combined Radium (-226 and -228)ResolvedOct 1, 2021 to Dec 31, 2021
Gross Alpha, Excl. Radon and UResolvedOct 1, 2021 to Dec 31, 2021

Apple Springs Subdivision

SD4602318 · Groundwater · 180 people served system-wide

EPA SDWIS explicitly lists this ZIP in the system's served geography.

No active health-based record in this imported snapshot

Find this utility’s official report →
Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level
Reported level
0.002 mg/L
Action level
0.015 mg/L

13% of the listed benchmark

Monitoring period: Jan 1, 2025 to Dec 31, 2025

Violation history (1)
Imported violation history for Apple Springs Subdivision
RuleStatusPeriod
Revised Total Coliform RuleResolvedMay 1, 2022 to May 31, 2022

City summary

What the indexed records say

Hill City has 1 published ZIP profile across Pennington County. The regional-evidence median is 314 PPM. The city does not meet the stricter comparison standard.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard1 ZIP

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
18.4 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: May 9, 2016 to Aug 31, 2021.

ZIP directory

Water reports in Hill City

Open a ZIP for site-level provenance and measurements.

ZIP code

57745

Very Hard

314 PPM

Nearest site
18.4 mi
Confidence
Moderate

View full ZIP evidence →

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Hill City

Is the water hard?

Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.