How does Jennings's water compare to the national average?

The USA national average is 151 mg/L. Jennings (≈ 120–179 mg/L) is 1 mg/L softer than average.

Jennings Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

groundwater

pH Level

7.4

neutral = 7.0

Lead

0.009 mg/L

✓ Below action level

TDS

370 mg/L

Est. Daily Cost

$0.40

energy & soap waste

Source: See methodology section below · Updated 2026

hard~120–179 mg/LHard · est.

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 20% efficiency due to mineral buildup.

Appliance	In Jennings	Soft Water City	Efficiency Loss
Kettle	6.8 yrs	8.5 yrs	-20%
Washing Machine	9.6 yrs	12 yrs	-20%
Water Heater	12 yrs	15 yrs	-20%

Regional Water Comparison

How Jennings compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Jennings, Louisiana	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater
Crowley, Louisiana	≈ 120–179 mg/L	14 ppt	🟠 Hard	river
Eunice, Louisiana	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater
Moss Bluff, Louisiana	≈ 120–179 mg/L	13.1 ppt	🟠 Hard	river
Lake Charles, Louisiana	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater

National Benchmark

How Jennings compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Jennings	≈ 120–179 mg/L	🟠 Moderate
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Jennings's Water Unique?

Local geology and source profile

Source: GroundwaterTDS: 370 mg/LpH: 7.4

The City of Jennings Water System, serving Jefferson Davis Parish, draws its supply from the Gulf Coast Aquifer. This significant groundwater resource underlies the coastal plain and provides water that is treated at municipal facilities before distribution to residents. A 2023 Louisiana Department of Health Water Grade report gave the system a score of 86 out of 100, indicating it meets state and federal drinking water standards.

The Jennings water supply originates from the Gulf Coast Aquifer, tapping into Quaternary and Tertiary sedimentary formations. These layers, mainly sand, silt, and clay with some limestone, were laid down over millions of years. As groundwater moves through these sediments, it picks up moderate amounts of calcium and magnesium, resulting in the region's typical moderately hard water.

Homeowners in Jennings might notice scale forming in kettles and a decrease in how well soap lathers. Over time, minerals can build up in appliances like water heaters and dishwashers. While a water softener isn't strictly necessary, many households opt for one or use point-of-use filters to improve water for bathing and laundry. Routine descaling and filter changes for your appliances can help manage the effects of this moderate hardness. The water is considered safe to drink, meeting all EPA MCLGs.

Geology & Source: Gulf Coast Aquifer system; Quaternary and Tertiary sedimentary formations, sand, clay, and limestone interbeds contribute to moderate hardness

Other Louisiana Water Reports

Crowley

≈ 120–179 mg/L

🟠 Hard

Eunice

≈ 120–179 mg/L

🟠 Hard

Moss Bluff

≈ 120–179 mg/L

🟠 Hard

Lake Charles

≈ 120–179 mg/L

🟠 Hard

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Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

All reports are reviewed by our team. Thank you for supporting data quality!

Frequently Asked Questions

Is Jennings's water safe to drink?

Yes. Jennings's water meets all federal safety standards. The hardness is ≈ 120–179 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Jennings?

At ≈ 120–179 mg/L (Hard), Jennings's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 20%.

How does Jennings compare to the USA average?

The USA national average is 151 mg/L. Jennings (≈ 120–179 mg/L) is 1 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Jennings is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

Water Hardness

Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

TDS — Total Dissolved Solids

Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.

Measured

PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances

EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.

Modelled

Lead

Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.

Calculated

Appliance Lifespan

Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.