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Jefferson Davis Parish, LA Water Quality

Water quality data for 6 public water systems serving Jefferson Davis Parish, Louisiana — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 6 water systems · 6 cities
✅
Generally Safe — Most Systems Performing Well

The majority of water systems have no active violations and lead levels well below the federal action level.

B

Jefferson Davis Parish Earns a B

Jefferson Davis Parish: 6 communities across 6 water systems. 83.3% have no open violations.

  • Median lead where detected: 3.00 ppb
  • 5 communities with a lead detection, 1 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 3 with significant inspection deficiencies
  • 83.3% of communities have no open violations
3 ppb
Median Lead Level
County-wide, 90th percentile
6
Water Systems
Active CWS & NTNCWS
83%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • Lacassine
    4.20 ppb
    No federal limits exceeded on record
    A
  • Welsh
    3.00 ppb
    1 health-based violation since 2015
    A
  • Lake Arthur
    Not detected
    1 significant inspection deficiency
    A
  • Elton
    2.00 ppb
    1 significant inspection deficiency
    C
  • Jennings
    1.00 ppb
    2 violations currently open
    D
⚠ Needs Attention
  • Fenton
    17.00 ppb
    Lead above the 15 ppb action level
    D
  • Jennings
    1.00 ppb
    2 violations currently open
    D
  • Elton
    2.00 ppb
    1 significant inspection deficiency
    C
  • Lake Arthur
    Not detected
    1 significant inspection deficiency
    A
  • Welsh
    3.00 ppb
    1 health-based violation since 2015
    A
County Lead Level — Median 3 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 3 ppb — 20% of the federal action level
Systems by Lead Level
Under 5 ppb
4
10 – 15 ppb
1
No Data
1

All Cities in Jefferson Davis Parish

Jennings 1.00 ppb D
Welsh 3.00 ppb A
Lake Arthur Not detected A
Elton 2.00 ppb C
Lacassine 4.20 ppb A
Fenton 17.00 ppb D
Showing 6 cities
No active violations Active violations

About Jefferson Davis Parish Drinking Water

Jefferson Davis Parish is served by 6 water systems covering 6 communities. 83% have no open violations.

Of the communities reporting lead results, 5 recorded a detection, with a median of 3.00 ppb — 20% of the federal action level. 1 reported none detected, which means below the laboratory limit rather than an absence of lead.

No community here has PFAS above the federal limit on record. State inspectors recorded significant deficiencies at 3 of them.

Frequently Asked Questions

Is Jefferson Davis Parish tap water safe to drink?▼
83% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Jefferson Davis Parish?▼
Among communities with a detection the median is 3.00 ppb, 20% of the 15 ppb action level. 1 reported none detected and 0 reported no result.
How many water systems serve Jefferson Davis Parish?▼
6 community water systems serve 6 communities here.
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