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.
Rapid City
SD4600406 · Surface water · 72,009 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
40% 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.
Weston Heights Homeowners Associatio
SD4600862 · Groundwater · 412 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
47% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
Violation history (3)
Imported violation history for Weston Heights Homeowners Associatio| Rule | Status | Period |
|---|
| Consumer Confidence Rule | Unaddressed | Jul 1, 2025 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Feb 18, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Feb 18, 2025 |
Ar Ranch
SD4602379 · Groundwater · 88 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.
Spearfish Meadows
SD4600875 · Groundwater · 87 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.
Whispering Willows
SD4602094 · Groundwater · 64 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 (8)
Imported violation history for Whispering Willows| Rule | Status | Period |
|---|
| Revised Total Coliform Rule | Resolved | Apr 1, 2022 to Apr 30, 2022 |
| Public Notice | Resolved | Feb 9, 2022 to Jun 20, 2022 |
| Chlorine | Resolved | Jan 1, 2022 to Mar 31, 2022 |
| Chlorine | Resolved | Oct 1, 2021 to Dec 31, 2021 |
| Consumer Confidence Rule | Resolved | Jul 1, 2021 to Aug 1, 2022 |
| Chlorine | Resolved | Jul 1, 2021 to Sep 30, 2021 |
| Revised Total Coliform Rule | Resolved | Jan 1, 2021 to Jan 31, 2021 |
| Chlorine | Resolved | Jan 1, 2021 to Mar 31, 2021 |
Elk Valley Ranchettes
SD4602189 · Groundwater · 62 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 (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Elk Creek Valley View Assoc
SD4602363 · Groundwater · 52 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.
West Nike Subdivision
SD4602260 · Groundwater · 50 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.
Cedar Gulch 2
SD4602295 · Groundwater · 40 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.
Rimrock Heights Homeowners Associati
SD4602356 · 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
27% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
Violation history (1)
Imported violation history for Rimrock Heights Homeowners Associati| Rule | Status | Period |
|---|
| Nitrate | Resolved | Oct 1, 2021 to Dec 31, 2021 |
Colonial Pine Hills Sanitary Distric
SD4600263 · Groundwater · 1,200 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.
Chapel Lane Water Company
SD4600264 · Groundwater · 1,200 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.
Hisega Meadows Water Inc
SD4600271 · Groundwater influenced by surface water · 491 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.
Hart Ranch
SD4600910 · Groundwater · 438 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
- Reported level
- Action level
7% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- Action level
154% of the listed benchmark
Monitoring period: Jan 1, 2004 to Jun 30, 2004
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Pine Grove
SD4600948 · Groundwater · 425 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.
South Canyon Country Estates
SD4600627 · 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
- 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.
The Ranch At Black Gap
SD4602203 · Groundwater · 375 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.
Timberwood Park Estates
SD4602272 · Groundwater · 283 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.
Golden Valley Water Company
SD4602261 · Groundwater · 283 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
- Reported level
- Action level
7% of the listed benchmark
Monitoring period: Jan 1, 2025 to Dec 31, 2025
Gross Alpha, Excl. Radon and U
EPA SDWIS reported health-based violation
- Reported level
- Maximum contaminant level
107% of the listed benchmark
Monitoring period: Jul 1, 2021 to Sep 30, 2021
Violation history (1)
Imported violation history for Golden Valley Water Company| Rule | Status | Period |
|---|
| Gross Alpha, Excl. Radon and UHealth-based | Resolved | Jul 1, 2021 to Sep 30, 2021 |
Carriage Hills
SD4600265 · Groundwater · 267 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.
Rapid Valley Sanitary District
SD4600274 · Surface water · 11,408 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.
Cedar Gulch 1
SD4602301 · Groundwater · 45 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 (1)
Imported violation history for Cedar Gulch 1| Rule | Status | Period |
|---|
| Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-based | Resolved | Feb 1, 2025 to May 22, 2025 |
Darlington Estates
SD4600403 · Groundwater · 25 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 (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.
Combined Radium (-226 and -228)
EPA SDWIS reported health-based violation
- Reported level
- Maximum contaminant level
260% of the listed benchmark
Monitoring period: Jan 1, 2026 to Mar 31, 2026
Gross Alpha, Excl. Radon and U
EPA SDWIS reported health-based violation
- Reported level
- Maximum contaminant level
167% of the listed benchmark
Monitoring period: Jan 1, 2026 to Mar 31, 2026
Violation history (5)
Imported violation history for Darlington Estates| Rule | Status | Period |
|---|
| Combined Radium (-226 and -228)Health-based | Archived | Jan 1, 2026 to Mar 31, 2026 |
| Gross Alpha, Excl. Radon and UHealth-based | Archived | Jan 1, 2026 to Mar 31, 2026 |
| Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-based | Unaddressed | Nov 12, 2025 |
| Combined Radium (-226 and -228)Health-based | Archived | Oct 1, 2025 to Dec 31, 2025 |
| Combined Radium (-226 and -228)Health-based | Archived | Jul 1, 2025 to Sep 30, 2025 |