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.
Belle Fourche
SD4600037 · Groundwater · 5,617 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
- Reported level
- Action level
20% 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.
Rimrock Water Company Llc
SD4602220 · Groundwater · 365 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
- Reported level
- Action level
13% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
Violation history (4)
Imported violation history for Rimrock Water Company Llc| Rule | Status | Period |
|---|
| Revised Total Coliform Rule | Resolved | Oct 1, 2022 to Oct 31, 2022 |
| Chlorine | Resolved | Oct 1, 2022 to Dec 31, 2022 |
| Total Haloacetic Acids (HAA5) | Resolved | Aug 1, 2022 to Sep 30, 2022 |
| TTHM | Resolved | Aug 1, 2022 to Sep 30, 2022 |
Hay Creek Water Company
SD4602143 · Groundwater · 323 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
- Reported level
- Action level
7% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
Violation history (4)
Imported violation history for Hay Creek Water Company| Rule | Status | Period |
|---|
| Revised Total Coliform Rule | Resolved | Jun 1, 2025 to Jun 30, 2025 |
| TTHM | Resolved | Aug 1, 2022 to Sep 30, 2022 |
| Total Haloacetic Acids (HAA5) | Resolved | Aug 1, 2022 to Sep 30, 2022 |
| Lead and Copper Rule | Resolved | Jan 1, 2022 to Jun 30, 2022 |
Black Hills Water Distribution, Llc
SD4602144 · Groundwater · 135 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
- Reported level
- Action level
7% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Fruitdale
SD4600135 · Groundwater · 75 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
- Reported level
- Action level
7% of the listed benchmark
Monitoring period: Jan 1, 2023 to Dec 31, 2023
Violation history (1)
Imported violation history for Fruitdale| Rule | Status | Period |
|---|
| Revised Total Coliform Rule | Resolved | Oct 1, 2023 to Oct 31, 2023 |
Whispering Pines Water Association
SD4600268 · Groundwater · 48 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
- Reported level
- Action level
13% of the listed benchmark
Monitoring period: Jan 1, 2024 to Dec 31, 2024
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Red Water Distribution Llc
SD4602257 · Groundwater · 35 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
- Reported level
- Action level
20% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
Violation history (1)
Imported violation history for Red Water Distribution Llc| Rule | Status | Period |
|---|
| Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-based | Resolved | Aug 4, 2021 to Feb 2, 2022 |