PlainWater
Counties → Louisiana

Jefferson Parish County, Louisiana

Water Systems
4
Population Served
440,987
Total Violations
247
125 health-based
PFAS Detected
4
of 4 tested

Violation Analysis

100.0%
Systems with Violations
61.8
Avg Violations per System
50.6%
Health-Based Violations

Water Source Types

SW
4 systems (100%)

PFAS Contamination

4
Systems Tested
4
PFAS Detected
100.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Jefferson Parish Louisiana water systems by violation status, EPA SDWIS records.

No violations on record (0) One or more violations (4)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
E Jefferson Ww District 1 275,163 2 Detected
W Jefferson Ww District 2 140,264 14 Detected
Gretna Waterworks 17,026 72 Detected
Westwego Waterworks 8,534 159 Clean

Other Counties in Louisiana

East Baton Rouge Parish County
19 systems · 650,087 served · 566 violations
Orleans Parish County
10 systems · 389,093 served · 157 violations
Lafayette Parish County
62 systems · 303,179 served · 2,569 violations
St. Tammany Parish County
213 systems · 266,825 served · 7,149 violations
Caddo Parish County
48 systems · 249,641 served · 5,038 violations
Calcasieu Parish County
80 systems · 216,042 served · 3,535 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Jefferson Parish County? ▼
Jefferson Parish County has 247 total drinking water violations across 4 water systems, of which 125 are health-based violations. 100.0% of systems have at least one violation.
How many people get water from Jefferson Parish County systems? ▼
Water systems in Jefferson Parish County serve approximately 440,987 people through 4 public water systems.
Has PFAS been detected in Jefferson Parish County water? ▼
Of 4 water systems tested for PFAS in Jefferson Parish County, 4 had PFAS detected (100.0% detection rate).
What types of water sources supply Jefferson Parish County? ▼
Water systems in Jefferson Parish County use SW (4 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 50.6% of Jefferson Parish County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.