Lafayette County, Louisiana
49 ZIP codes · Avg score 61/100 · Grade C · Updated 2026-06-04
Safe water is the norm for most of Lafayette County's 49 ZIP codes — but a notable subset have documented violations that push the grade to the middle tier.
How Lafayette County Compares
How Lafayette County Compares
Lafayette County scores 10 points below the Louisiana state average (71/100) and 7 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Lafayette County, Louisiana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.2 (asthma 9.8%, diabetes 14.6%)
Estimated additional annual cost per homeowner: $5,200, driven primarily by sea_level
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Lafayette County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 48 violations. Past 5 years: 108 total (108 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
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.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $5,200
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 Lafayette County
Remediation costs are relatively manageable for most homeowners in Lafayette 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 Lafayette 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 Lafayette County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Milton Purchase Water System | 11,430 | 14 |
| 2 | Milton Water System | 1,782 | 14 |
| 3 | Lpwdn North Region | 16,833 | 11 |
| 4 | City of Youngsville Purchase Ws | 8,886 | 8 |
| 5 | City of Broussard Water System | 5,151 | 8 |
34 total water systems serve Lafayette County.
All ZIP Codes in Lafayette County
49 ZIP codes tracked in Lafayette County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 70595 | Lafayette | 99 | A | 0 | — |
| 2 | 70596 | Lafayette | 99 | A | 0 | — |
| 3 | 70598 | Lafayette | 99 | A | 0 | — |
| 4 | 70500 | Lafayette | 95 | A | 0 | — |
| 5 | 70504 | Lafayette | 95 | A | 0 | — |
| 6 | 70509 | Lafayette | 95 | A | 0 | — |
| 7 | 70593 | Lafayette | 95 | A | 0 | — |
| 8 | 70502 | Lafayette | 90 | A | 0 | — |
| 9 | 70558 | Milton | 84 | B | 6 (1 health) | — |
| 10 | 70501 | Lafayette | 80 | B | 0 | $117K |
| 11 | 70503 | Lafayette | 80 | B | 0 | $327K |
| 12 | 70507 | Lafayette | 80 | B | 0 | $207K |
| 13 | 70518 | Broussard | 80 | B | 0 | $287K |
| 14 | 70529 | Duson | 77 | B | 3 | $190K |
| 15 | 70583 | Scott | 76 | B | 4 (1 health) | $130K |
| 16 | 70506 | Lafayette | 75 | B | 0 | $216K |
| 17 | 70508 | Lafayette | 75 | B | 0 | $299K |
| 18 | 70520 | Carencro | 75 | B | 4 | $200K |
| 19 | 70592 | Youngsville | 74 | B | 8 (3 health) | $239K |
| 20 | 70033 | Metairie | 60 | C | 0 | — |
| 21 | 70060 | Metairie | 60 | C | 0 | — |
| 22 | 70064 | Kenner | 60 | C | 0 | — |
| 23 | 70097 | Kenner | 60 | C | 0 | — |
| 24 | 70004 | Metairie | 52 | D | 0 | — |
| 25 | 70009 | Metairie | 52 | D | 0 | — |
| 26 | 70010 | Metairie | 52 | D | 0 | — |
| 27 | 70011 | Metairie | 52 | D | 0 | — |
| 28 | 70055 | Metairie | 52 | D | 0 | — |
| 29 | 70059 | Harvey | 52 | D | 0 | — |
| 30 | 70063 | Kenner | 52 | D | 0 | — |
| 31 | 70073 | Marrero | 52 | D | 0 | — |
| 32 | 70081 | Pilottown | 52 | D | 0 | — |
| 33 | 70038 | Boothville | 47 | D | 0 | — |
| 34 | 70050 | Empire | 47 | D | 0 | — |
| 35 | 70082 | Pointe A La Hache | 47 | D | 0 | $38K |
| 36 | 70091 | Venice | 42 | D | 0 | — |
| 37 | 70001 | Metairie | 37 | F | 0 | $313K |
| 38 | 70002 | Metairie | 37 | F | 0 | $379K |
| 39 | 70003 | Metairie | 37 | F | 0 | $255K |
| 40 | 70005 | Metairie | 37 | F | 0 | $381K |
| 41 | 70006 | Metairie | 37 | F | 0 | $333K |
| 42 | 70032 | Arabi | 37 | F | 0 | $212K |
| 43 | 70036 | Barataria | 37 | F | 0 | $188K |
| 44 | 70041 | Buras | 37 | F | 0 | $74K |
| 45 | 70062 | Kenner | 37 | F | 0 | $198K |
| 46 | 70065 | Kenner | 37 | F | 0 | $256K |
| 47 | 70067 | Lafitte | 37 | F | 0 | $205K |
| 48 | 70083 | Port Sulphur | 37 | F | 0 | $89K |
| 49 | 70358 | Grand Isle | 37 | F | 0 | $266K |
Recommended Buyer Guides for Lafayette County
Independent picks. EPA-grounded. Matched here.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Lafayette County, Louisiana
Overview
Lafayette County in Louisiana covers 49 ZIP codes with an average Home Safety Score of C (61/100).
5 of 49 ZIP codes have recorded EPA violations. 5 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.