Richland County, Louisiana
5 ZIP codes · Avg score 76/100 · Grade B · Updated 2026-06-04
Richland County's tap water quality puts it in the upper tier nationally; the 5 ZIP codes here record few health-based violations.
How Richland County Compares
How Richland County Compares
Richland County scores 5 points above the Louisiana state average (71/100) and 8 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Richland County, Louisiana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 17.1 (asthma 11%, diabetes 17.8%)
Estimated additional annual cost per homeowner: $1,558, driven primarily by flood
Infrastructure: 0.327% avg pipe failure probability, 25% of ZIPs at high risk
44.3% of homes built before 1978 (lead paint era)
Violation History (2023–2025)
→ Stable trendEPA violation counts by year across Richland County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 8 violations. Past 5 years: 15 total (15 health-based).
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
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,558
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
6,511 housing units in Richland 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 Richland County
Remediation costs are relatively manageable for most homeowners in Richland 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 Richland 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 Richland County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Rayville Water System | 4,842 | 25 |
| 2 | Start Water System | 2,514 | 25 |
| 3 | River Road Water System | 3,510 | 25 |
| 4 | Bcc Detention Center Ws | 150 | 25 |
| 5 | Palmetto Addiction Recovery | 45 | 25 |
7 total water systems serve Richland County.
All ZIP Codes in Richland County
5 ZIP codes tracked in Richland County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 71218 | Archibald | 95 | A | 0 | — |
| 2 | 71279 | Start | 87 | A | 0 | — |
| 3 | 71259 | Mangham | 81 | B | 4 (1 health) | $126K |
| 4 | 71219 | Baskin | 60 | C | 0 | $94K |
| 5 | 71269 | Rayville | 55 | C | 25 (12 health) | $137K |
Recommended Buyer Guides for Richland County
Where county records show a lead exceedance or pre-1978 housing concentration, lead-specific filters and test kits move toward the top of the list.
- 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 Richland County, Louisiana
Overview
Richland County in Louisiana covers 5 ZIP codes with an average Home Safety Score of B (76/100).
2 of 5 ZIP codes have recorded EPA violations. 13 health-based violations have been documented.
← Back to Louisiana 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.