Tangipahoa County, Louisiana
14 ZIP codes · Avg score 75/100 · Grade B · Updated 2026-06-04
The 14 water systems serving Tangipahoa County show strong compliance with federal drinking water standards.
How Tangipahoa County Compares
How Tangipahoa County Compares
Tangipahoa County scores 4 points above the Louisiana state average (71/100) and 7 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Tangipahoa County, Louisiana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15.1 (asthma 10.5%, diabetes 14.6%)
Estimated additional annual cost per homeowner: $5,238, driven primarily by sea_level
Infrastructure: 0.298% avg pipe failure probability, 8% of ZIPs at high risk
43.1% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Tangipahoa County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 19 violations. Past 5 years: 38 total (38 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.
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: $5,238
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
56,205 housing units in Tangipahoa 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 Tangipahoa County
Remediation costs are relatively manageable for most homeowners in Tangipahoa 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 Tangipahoa 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 Tangipahoa County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Eastern Heights Water Works | 1,782 | 25 |
| 2 | Tangipahoa Parish Water District | 72,504 | 19 |
| 3 | City of Hammond Water System | 21,135 | 19 |
| 4 | Village of Tangipahoa Water System | 748 | 19 |
| 5 | Kentwood Water System | 2,205 | 17 |
29 total water systems serve Tangipahoa County.
All ZIP Codes in Tangipahoa County
14 ZIP codes tracked in Tangipahoa County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 70404 | Hammond | 94 | A | 3 (1 health) | — |
| 2 | 70456 | Roseland | 89 | A | 2 (1 health) | $116K |
| 3 | 70446 | Loranger | 81 | B | 11 (3 health) | $205K |
| 4 | 70465 | Tangipahoa | 81 | B | 2 (1 health) | — |
| 5 | 70466 | Tickfaw | 80 | B | 1 | $174K |
| 6 | 70401 | Hammond | 79 | B | 3 (1 health) | $227K |
| 7 | 70403 | Hammond | 79 | B | 3 (1 health) | $208K |
| 8 | 70437 | Folsom | 79 | B | 1 (1 health) | $304K |
| 9 | 70443 | Independence | 79 | B | 5 (1 health) | $146K |
| 10 | 70444 | Kentwood | 75 | B | 17 (5 health) | $173K |
| 11 | 70454 | Ponchatoula | 70 | B | 9 (2 health) | $220K |
| 12 | 70436 | Fluker | 60 | C | 0 | — |
| 13 | 70451 | Natalbany | 52 | D | 0 | — |
| 14 | 70421 | Akers | 47 | D | 0 | — |
Recommended Buyer Guides for Tangipahoa County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Tangipahoa County, Louisiana
Overview
Tangipahoa County in Louisiana covers 14 ZIP codes with an average Home Safety Score of B (75/100).
11 of 14 ZIP codes have recorded EPA violations. 17 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.