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RUSHMORE RANCH ESTATES

PWS ID: SD4602212 · BLACK HAWK, South Dakota 57718

RUSHMORE RANCH ESTATES serves 168 people in BLACK HAWK, South Dakota using Groundwater water sources. It has 70 recorded EPA violations, including 5 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: RUSHMORE RANCH ESTATES

RUSHMORE RANCH ESTATES is a private-owned community water system that delivers drinking water to 168 residents in BLACK HAWK, South Dakota (Pennington County) through 67 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 70 total violations for this system , of which 5 (7%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 65 monitoring and reporting violations are on file. The most recent violation on record dates to 2016.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 6 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across South Dakota, EPA tracks 654 public water systems serving 915,901 people, with 56,254 cumulative violations and 8,399 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 86 violations. RUSHMORE RANCH ESTATES's 70 violations sit below the South Dakota average. Statewide, 42 of 49 UCMR5-tested systems have reported PFAS detections (85.7%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
168
Total Violations
70
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
67
County
Pennington
School/Daycare
No
MCL Violations
3
Monitoring Violations
65
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 6 2001
Chlorine MR 5 2016
TTHM MR 3 2016
Lead and Copper Rule MR 3 2016
Revised Total Coliform Rule MON 3 2016
Coliform (TCR) MCL 3 2002
Total Haloacetic Acids (HAA5) MR 3 2016
DICHLOROMETHANE MR 2 2002
1,2,4-Trichlorobenzene MR 2 2002
1,1,2-Trichloroethane MR 2 2002
1,1-Dichloroethylene MR 2 2002
Carbon tetrachloride MR 2 2002
Benzene MR 2 2002
1,2-Dichloroethane MR 2 2002
Toluene MR 2 2002
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 2 2015
Ethylbenzene MR 2 2002
Xylenes, Total MR 2 2002
cis-1,2-Dichloroethylene MR 2 2002
Styrene MR 2 2002
Trichloroethylene MR 2 2002
Vinyl chloride MR 2 2002
o-Dichlorobenzene MR 2 2002
CHLOROBENZENE MR 2 2002
1,1,1-Trichloroethane MR 2 2002
p-Dichlorobenzene MR 2 2002
trans-1,2-Dichloroethylene MR 2 2002
1,2-Dichloropropane MR 2 2002
Tetrachloroethylene MR 2 2002

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for RUSHMORE RANCH ESTATES.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID SD4602212 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

South Dakota Drinking Water Authority

South Dakota's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find SD regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2016 Chlorine MR 5 SDWIS / SD4602212 / 0999
2016 TTHM MR 3 SDWIS / SD4602212 / 2950
2016 Lead and Copper Rule MR 3 SDWIS / SD4602212 / 5000
2016 Revised Total Coliform Rule MON 3 SDWIS / SD4602212 / 8000
2016 Total Haloacetic Acids (HAA5) MR 3 SDWIS / SD4602212 / 2456
2015 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 2 SDWIS / SD4602212 / 0400
2002 Coliform (TCR) MCL 3 SDWIS / SD4602212 / 3100
2002 DICHLOROMETHANE MR 2 SDWIS / SD4602212 / 2964
2002 1,2,4-Trichlorobenzene MR 2 SDWIS / SD4602212 / 2378
2002 1,1,2-Trichloroethane MR 2 SDWIS / SD4602212 / 2985
2002 1,1-Dichloroethylene MR 2 SDWIS / SD4602212 / 2977
2002 Carbon tetrachloride MR 2 SDWIS / SD4602212 / 2982
2002 Benzene MR 2 SDWIS / SD4602212 / 2990
2002 1,2-Dichloroethane MR 2 SDWIS / SD4602212 / 2980
2002 Toluene MR 2 SDWIS / SD4602212 / 2991

How RUSHMORE RANCH ESTATES Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric RUSHMORE RANCH ESTATES South Dakota avg Federal benchmark
Total violations 70 86 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 5 12.8 Indicates a contaminant exceeded a federal MCL
PFAS detection None 85.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 168 1,400 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 654 regulated public water systems in South Dakota.

Federal MCL reference — Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is RUSHMORE RANCH ESTATES water safe to drink? ▼
RUSHMORE RANCH ESTATES (PWS ID: SD4602212) has 70 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 168 people using Groundwater sources.
How many people does RUSHMORE RANCH ESTATES serve? ▼
RUSHMORE RANCH ESTATES serves 168 people in BLACK HAWK, South Dakota. It is a Private-owned system using Groundwater water sources with 67 service connections.
What type of violations does RUSHMORE RANCH ESTATES have? ▼
RUSHMORE RANCH ESTATES has 70 total violations: 5 health-based violations (MCL exceedances or treatment failures), 65 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in RUSHMORE RANCH ESTATES water? ▼
No PFAS testing data is available for RUSHMORE RANCH ESTATES under the EPA's UCMR5 monitoring program.
What water source does RUSHMORE RANCH ESTATES use? ▼
RUSHMORE RANCH ESTATES uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial