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States → South Dakota

OAK MOUNTAIN COUNTRY ESTATES

PWS ID: SD4602151 · BLACK HAWK, South Dakota 57718

Population Served
85
Total Violations
323
Health-Based Violations
169
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
34
County
Lawrence
School/Daycare
No
MCL Violations
165
Monitoring Violations
147
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Gross Alpha, Excl. Radon and U MCL 88 2017
Combined Radium (-226 and -228) MCL 71 2017
Lead and Copper Rule MR 8 1998
Coliform (TCR) MCL 6 2000
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 4 2016
Public Notice Other 4 2013
Revised Total Coliform Rule MON 3 2016
Asbestos MR 3 1993
Coliform (TCR) MR 3 2002
Consumer Confidence Rule Other 2 2000
Chlorine MR 2 2016
LASSO MR 2 1993
Heptachlor MR 2 1993
Heptachlor epoxide MR 2 1993
Atrazine MR 2 1993
Methoxychlor MR 2 1993
Total Polychlorinated Biphenyls (PCB) MR 2 1993
Di(2-ethylhexyl) adipate MR 2 1993
Hexachlorocyclopentadiene MR 2 1993
Chlordane MR 2 1993
Aldicarb sulfoxide MR 2 1993
Carbofuran MR 2 1993
OXAMYL MR 2 1993
2,4,5-TP MR 2 1993
Picloram MR 2 1993
2,4-D MR 2 1993
ETHYLENE DIBROMIDE MR 2 1993
Endothall MR 2 1993
Diquat MR 2 1993
cis-1,2-Dichloroethylene MR 2 1996
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.