PlainWater
Counties → South Dakota

Pennington County, South Dakota

Water Systems
157
Population Served
140,305
Total Violations
11,864
1,896 health-based
PFAS Detected
6
of 6 tested

Violation Analysis

91.7%
Systems with Violations
75.6
Avg Violations per System
16.0%
Health-Based Violations

Water Source Types

GW
46 systems (29%)
SW
4 systems (3%)

PFAS Contamination

6
Systems Tested
6
PFAS Detected
100.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Pennington South Dakota water systems by violation status, EPA SDWIS records.

No violations on record (2) One or more violations (48)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Rapid City 72,009 14 Detected
Box Elder 14,000 330 Clean
Rapid Valley Sanitary District 11,408 15 Detected
Ellsworth Afb 9,100 17 Clean
Nps-Mount Rushmore National Memorial 4,100 68 Detected
Colonial Pine Hills Sanitary Distric 1,200 80 -
Chapel Lane Water Company 1,200 8 -
Wr/Lj - Creighton Project 1,170 0 -
Reptile Gardens Inc 1,169 12 -
Bear Country USA 1,021 176 -
Country Store at Three Forks 1,000 12 -
Addie Camp Water and Septic 900 2 -
Hill City 872 251 -
Palmer Gulch Lodge/Mt Rushmore KOA 850 9 -
Powder House Lodge 700 13 -
Wall 699 80 Clean
New Underwood 679 144 -
Cosmos Mystery Area 600 55 -
Usfs-Bhnf Pactola Visitor Center 535 45 -
Dinosaur Museum 500 55 -
Pactola Pines Store 500 57 -
Hisega Meadows Water Inc 491 11 -
Rapid City South RV Park 440 28 -
Hart Ranch 438 237 -
Pine Grove 425 32 -
South Canyon Country Estates 420 30 -
The Ranch at Black Gap 375 2 -
Rafter-J Bar Ranch 374 0 -
Prairie Acres LLC 350 138 -
Keystone 349 50 -
Mountain Meadow Resort 330 30 -
Valley Heights Estates Inc 320 11 -
Rush Mountain Adventure Park 300 22 -
The Gaslight 300 53 -
Rushmore Mountain Coaster 300 3 -
Prairie Acres North 288 234 -
Carriage Hills 267 10 -
Happy Holiday RV Resort 264 271 -
Sunset Ranch 263 90 -
YMCA Giraffic Park 250 34 -
Medicine Mountain Scout Camp 250 36 -
Rapid City RV Park and Cg 236 95 -
Sunnyside Mobile Home Park II 235 72 -
Creekside LLC 235 23 -
Plainsview Mobile Manor 210 288 -
Blue Wing Recreation Area 200 3 -
Chapel in the Hills 200 7 -
Rushmore Tramway Adventures 200 18 -
Pine Cliff Estates 180 108 -
Htr Black Hills Resorts 180 47 -

Other Counties in South Dakota

Minnehaha County
15 systems · 254,737 served · 868 violations
Brookings County
12 systems · 41,264 served · 2,574 violations
Brown County
21 systems · 38,081 served · 1,750 violations
Lincoln County
8 systems · 35,801 served · 350 violations
Hughes County
6 systems · 27,114 served · 317 violations
Lawrence County
73 systems · 25,648 served · 6,945 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Pennington County? ▼
Pennington County has 11,864 total drinking water violations across 157 water systems, of which 1,896 are health-based violations. 91.7% of systems have at least one violation.
How many people get water from Pennington County systems? ▼
Water systems in Pennington County serve approximately 140,305 people through 157 public water systems.
Has PFAS been detected in Pennington County water? ▼
Of 6 water systems tested for PFAS in Pennington County, 6 had PFAS detected (100.0% detection rate).
What types of water sources supply Pennington County? ▼
Water systems in Pennington County use GW (46 systems), SW (4 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 16.0% of Pennington County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

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

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.