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.
Spearfish
SD4600311 · Groundwater · 13,803 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, 2024 to Dec 31, 2024
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Mountain Plains 2 Homeowners Assoc
SD4602169 · Groundwater · 268 people served system-wide
EPA SDWIS explicitly lists this ZIP in the system's served geography.
1 reported active health-based record(s) for this system
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 (5)
Imported violation history for Mountain Plains 2 Homeowners Assoc| Rule | Status | Period |
|---|
| Public Notice | Unaddressed | Dec 13, 2025 |
| Groundwater RuleHealth-based | Unaddressed | Oct 31, 2025 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2025 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2024 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2023 |
Saint Onge Sewer & Water Co
SD4600287 · Groundwater · 255 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.
Lantern Estates
SD4600315 · Groundwater · 192 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, 2024 to Dec 31, 2024
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Walnut Park
SD4600316 · 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
- Reported level
- Action level
13% of the listed benchmark
Monitoring period: Jan 1, 2024 to Dec 31, 2024
Violation history (2)
Imported violation history for Walnut Park| Rule | Status | Period |
|---|
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Feb 11, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Feb 11, 2025 |
Spearfish Valley Mobile Estates
SD4600625 · Groundwater · 163 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, 2024 to Dec 31, 2024
Violation history (2)
Imported violation history for Spearfish Valley Mobile Estates| Rule | Status | Period |
|---|
| Revised Total Coliform Rule | Resolved | Feb 1, 2024 to Feb 29, 2024 |
| Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-based | Resolved | Oct 1, 2021 to Feb 17, 2022 |
Country Road Estates
SD4602204 · Groundwater · 112 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 (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Ken'S Trailer Court
SD4600314 · Groundwater · 110 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
33% of the listed benchmark
Monitoring period: Jan 1, 2024 to Dec 31, 2024
Violation history (2)
Imported violation history for Ken'S Trailer Court| Rule | Status | Period |
|---|
| Revised Total Coliform Rule | Resolved | Nov 1, 2021 to Nov 30, 2021 |
| Revised Total Coliform Rule | Resolved | Oct 1, 2021 to Oct 31, 2021 |
Westfield Addition
SD4600521 · Groundwater · 104 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, 2024 to Dec 31, 2024
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Westview Homeowners Association
SD4600876 · Groundwater · 103 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 (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Whitewood
SD4600368 · Groundwater · 879 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, 2024 to Dec 31, 2024
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 |
Whitewood Forest Acres
SD4602354 · Groundwater · 160 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 (2)
Imported violation history for Whitewood Forest Acres| Rule | Status | Period |
|---|
| Revised Total Coliform Rule | Archived | Sep 1, 2025 to Sep 30, 2025 |
| Revised Total Coliform Rule | Resolved | Oct 1, 2023 to Oct 31, 2023 |
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 |