Pennington County, South Dakota
13 ZIP codes · Avg score 76/100 · Grade B · Updated
ZipCheckup grade for Pennington County: B.
This ZIP looks solid, with a few items worth a quick check.
In current tracking cycles, Pennington County - spanning 13 ZIP codes - records above-average water quality outcomes; the county's compliance history over recent years shows few departures from federal standards.
How Pennington County Compares
How Pennington County Compares
Pennington County scores 7 points above the South Dakota state average (69/100) and 3 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Pennington County, South Dakota
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13 (asthma 10.2%, diabetes 12.1%)
Estimated additional annual cost per homeowner: $1,395, driven primarily by flood
63.1% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Pennington County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 8 violations. Past 5 years: 19 total (19 health-based). Health-based violations are declining versus the prior 2-year window.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,395
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
51,392 housing units in Pennington County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Pennington County
Remediation costs are relatively manageable for most homeowners in Pennington County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Pennington County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Pennington County
8 community water systems serving Pennington County.
- B
- B
- B
- B
- B
- B
Show all 8 water systems
- B
- C
15 total water systems serve Pennington County.
Systems with the most violations in Pennington County
3 water systems with recorded EPA violations.
- B
- B
- C
All ZIP Codes in Pennington County
13 ZIP codes tracked in Pennington County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 57701 | Rapid City | 83 | B | 2 | $230K |
| 2 | 57702 | Rapid City | 83 | B | 2 | $341K |
| 3 | 57790 | Wall | 83 | B | 0 | $188K |
| 4 | 57719 | Box Elder | 78 | B | 12 (9 health) | $275K |
| 5 | 57751 | Keystone | 67 | C | 0 | $388K |
| 6 | 57703 | Rapid City | 62 | C | 10 (9 health) | $250K |
| 7 | 57709 | Rapid City | — | — | — | |
| 8 | 57725 | Caputa | — | — | 0 | $275K |
| 9 | 57745 | Hill City | — | — | 0 | $324K |
| 10 | 57761 | New Underwood | — | — | 0 | $264K |
| 11 | 57767 | Owanka | — | — | — | |
| 12 | 57775 | Quinn | — | — | 0 | $179K |
| 13 | 57780 | Scenic | — | — | 0 | — |
Recommended Buyer Guides for Pennington County
Four sources - EPA, NSF, FEMA, CDC - drive the match.
- Best Lead Paint Test Kits — 63.1% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Pennington County, South Dakota
Overview
Pennington County in South Dakota covers 13 tracked ZIP records with an average Home Safety Score of B (76/100) across 6 scored records.
4 of 11 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 9 health-based violations appear in the available health breakdown.
← Back to South Dakota Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.