Jennings Water Hardness & Quality Report (2026)
Water Hardness
9.7 grains per gallon
Source
river
pH Level
8.2
neutral = 7.0
Lead
0.009 mg/L
✓ Below action level
TDS
440.2 mg/L
Est. Daily Cost
$0.44
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Jennings, your appliances are currently losing 22% efficiency due to mineral buildup.
| Appliance | In Jennings | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.1 yrs | 8.5 yrs | -52% |
| Washing Machine | 7.5 yrs | 12 yrs | -38% |
| Water Heater | 9 yrs | 15 yrs | -40% |
Regional Water Comparison
How Jennings compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Jennings, Louisiana | 165.5 mg/L | 14 ppt | 🟠 Hard | river |
| Crowley, Louisiana | 166 mg/L | 14 ppt | 🟠 Hard | river |
| Eunice, Louisiana | 166.5 mg/L | 14 ppt | 🟠 Hard | river |
| Moss Bluff, Louisiana | 153 mg/L | 13.1 ppt | 🟠 Hard | river |
| Lake Charles, Louisiana | 93 mg/L | 9.1 ppt | 🟡 Moderately Hard | river |
National Benchmark
How Jennings compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Jennings | 165.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Jennings's Water Unique?
Local geology and source profile
Jennings, Louisiana, in Jefferson Davis Parish — the Jefferson Davis Parish seat adjacent to Welsh and Lake Arthur in the southwest Louisiana rice prairie — receives its water from the City of Jennings Water Department, drawing from the Mermentau River and Chicot aquifer through the southwest Louisiana distribution.
The hard 165.5 mg/L hardness and TDS of 440.2 mg/L reflect the Jefferson Davis Parish supply's hard Gulf Coast character — the Quaternary Chicot aquifer sand and Pleistocene Prairie Formation are slightly calcareous-calcareous formations in the southwest Louisiana coastal plain; the Jennings supply acquires hard dissolved mineral content from its coastal plain calcareous drainage and deep Chicot aquifer groundwater (compare Welsh LA: 161/430 in Jefferson Davis Parish comparable; Lake Arthur LA: 169/450 in Jefferson Davis Parish comparable; Jennings consistent hard from the same Jefferson Davis Parish Chicot aquifer Quaternary supply). The Chicot aquifer supply — Quaternary Chicot aquifer sand (slightly calcareous — secondary contributor), Pleistocene Prairie Formation (calcareous — primary hardness contributor), and Holocene southwest Louisiana coastal alluvium (calcareous — TDS contributor).
At 165.5 mg/L with TDS 440, Jennings' water is hard — scale builds in appliances. Quarterly descaling is appropriate. The PFAS level of 14.0 ppt is very high — a certified filter with PFAS removal is strongly recommended. Review the City of Jennings' annual water quality report.
Geology & Source: Jennings in Jefferson Davis Parish draws from the Jennings Water on the Mermentau River/Chicot aquifer (Jefferson Davis Parish, southwest Louisiana) — the southwest Louisiana Gulf Coast at Jefferson Davis Parish draws from Quaternary Chicot aquifer sand (slightly calcareous) and Pleistocene Prairie Formation (calcareous) — Louisiana Jefferson Davis Parish Chicot aquifer Quaternary supply produces hard water at 165.5 mg/L with TDS 440.2 mg/L.