Louisa County, Virginia
11 ZIP codes · Avg score 49/100 · Grade D · Updated 2026-06-03
Louisa County ranks below average for water safety, with health-based violations recorded across multiple of its 11 ZIP codes.
How Louisa County Compares
How Louisa County Compares
Louisa County scores 17 points below the Virginia state average (66/100) and 19 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Louisa County, Virginia
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.9 (asthma 10.4%, diabetes 12.6%)
Estimated additional annual cost per homeowner: $1,874, driven primarily by sea_level
Infrastructure: 0.324% avg pipe failure probability
44.9% of homes built before 1978 (lead paint era)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,874
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
22,743 housing units in Louisa 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 Louisa County
Remediation costs are relatively manageable for most homeowners in Louisa 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 Louisa County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Louisa County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Louisa County Zion Crossroads | 2,137 | 10 |
| 2 | Gordonsville, Town of | 1,800 | 9 |
| 3 | Shenandoah Crossing | 950 | 9 |
| 4 | Pine Grove Mobile Home Park | 80 | 9 |
| 5 | MINERAL, TOWN OF | 478 | 9 |
15 total water systems serve Louisa County.
All ZIP Codes in Louisa County
11 ZIP codes tracked in Louisa County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 23093 | Louisa | 66 | C | 1 (1 health) | $269K |
| 2 | 23117 | Mineral | 64 | C | 8 | $273K |
| 3 | 20115 | Marshall | 53 | D | 0 | $658K |
| 4 | 20119 | Catlett | 53 | D | 0 | $597K |
| 5 | 20137 | Broad Run | 53 | D | 0 | $700K |
| 6 | 22942 | Gordonsville | 48 | D | 9 | $300K |
| 7 | 20116 | Marshall | 40 | D | 0 | — |
| 8 | 20138 | Calverton | 40 | D | 0 | — |
| 9 | 20139 | Casanova | 40 | D | 0 | — |
| 10 | 22724 | Jeffersonton | 40 | D | 0 | $502K |
| 11 | 23170 | Trevilians | 40 | D | 0 | — |
Recommended Buyer Guides for Louisa County
Below: editorial picks, no sponsored placements.
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Louisa County, Virginia
Overview
Louisa County in Virginia covers 11 ZIP codes with an average Home Safety Score of D (49/100).
3 of 11 ZIP codes have recorded EPA violations. 1 health-based violation have been documented.
← Back to Virginia water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.
What You Can Do
Louisa County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It details exactly what was found in your water supply.
Check for lead in your home
44.9% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.