Ouachita County, Louisiana
15 ZIP codes · Avg score 67/100 · Grade C · Updated 2026-06-04
Water monitoring across Ouachita County's 15 ZIP codes paints a mid-range picture — solid compliance in some zones, documented concerns in others; most violations on record are concentrated in specific prior years rather than spread evenly across the full compliance history, and the overall county grade has held steady in the middle tier without major shifts in either direction.
How Ouachita County Compares
How Ouachita County Compares
Ouachita County scores 4 points below the Louisiana state average (71/100) and 1 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Ouachita County, Louisiana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15.6 (asthma 10.9%, diabetes 15.4%)
Estimated additional annual cost per homeowner: $1,387, driven primarily by flood
Infrastructure: 0.367% avg pipe failure probability, 21% of ZIPs at high risk
Violation History (2021–2025)
→ Stable trendEPA violation counts by year across Ouachita County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 38 violations. Past 5 years: 125 total (125 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: $1,387
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Ouachita County
Remediation costs are relatively manageable for most homeowners in Ouachita 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 Ouachita 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 Ouachita County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Monroe Water System | 57,000 | 110 |
| 2 | Town & Country Service | 5,715 | 110 |
| 3 | Prairie Road Water District | 2,598 | 110 |
| 4 | Gowc North Water System | 13,287 | 23 |
| 5 | Gowc East Water System | 11,742 | 23 |
11 total water systems serve Ouachita County.
All ZIP Codes in Ouachita County
15 ZIP codes tracked in Ouachita County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 71225 | Calhoun | 89 | A | 5 (3 health) | $216K |
| 2 | 71294 | West Monroe | 86 | A | 4 (4 health) | — |
| 3 | 71292 | West Monroe | 76 | B | 4 (4 health) | $120K |
| 4 | 71291 | West Monroe | 71 | B | 4 (4 health) | $220K |
| 5 | 71208 | Monroe | 69 | C | 11 (9 health) | — |
| 6 | 71209 | Monroe | 69 | C | 11 (9 health) | — |
| 7 | 71212 | Monroe | 69 | C | 11 (9 health) | — |
| 8 | 71213 | Monroe | 69 | C | 11 (9 health) | — |
| 9 | 71217 | Monroe | 69 | C | 11 (9 health) | — |
| 10 | 71210 | Monroe | 66 | C | 11 (9 health) | — |
| 11 | 71211 | Monroe | 66 | C | 11 (9 health) | — |
| 12 | 71281 | Swartz | 60 | C | 0 | — |
| 13 | 71201 | Monroe | 51 | D | 11 (9 health) | $247K |
| 14 | 71202 | Monroe | 51 | D | 11 (9 health) | $77K |
| 15 | 71203 | Monroe | 51 | D | 11 (9 health) | $181K |
Recommended Buyer Guides for Ouachita County
Designed to find the guide that fits the county, not the other way around — the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.
- 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 Ouachita County, Louisiana
Overview
Ouachita County in Louisiana covers 15 ZIP codes with an average Home Safety Score of C (67/100).
14 of 15 ZIP codes have recorded EPA violations. 105 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.