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

The USA national average is 151 mg/L. Hammond (≈ 0–59 mg/L) is 121 mg/L softer than average.

Hammond Water Hardness & Quality Report (2026)

Water Hardness

soft

~0–59 mg/L

Soft

estimated · not lab-verified

Source

groundwater

pH Level

6.2

neutral = 7.0

Lead

0.002 mg/L

✓ Below action level

TDS

30 mg/L

Est. Daily Cost

$0.08

energy & soap waste

Source: See methodology section below · Updated 2026

soft~0–59 mg/LSoft · 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 Hammond, your appliances are currently losing 4% efficiency due to mineral buildup.

Appliance	In Hammond	Soft Water City	Efficiency Loss
Kettle	8.2 yrs	8.5 yrs	-4%
Washing Machine	11.5 yrs	12 yrs	-4%
Water Heater	14.4 yrs	15 yrs	-4%

Regional Water Comparison

How Hammond compares to its nearest neighbours

City	Hardness	Risk	Source
▶ Hammond, Louisiana	≈ 0–59 mg/L	🟢 Soft	groundwater
Mandeville, Louisiana	≈ 120–179 mg/L	🟠 Hard	groundwater
Laplace, Louisiana	≈ 120–179 mg/L	🟠 Hard	groundwater
Denham Springs, Louisiana	≈ 120–179 mg/L	🟠 Hard	groundwater
Gonzales, Louisiana	≈ 120–179 mg/L	🟠 Hard	groundwater

National Benchmark

How Hammond compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Hammond	≈ 0–59 mg/L	🟢 None
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Hammond's Water Unique?

Local geology and source profile

Source: GroundwaterTDS: 30 mg/LpH: 6.2

Hammond, Louisiana in Tangipahoa Parish is served by the Hammond Water System. The utility sources its drinking water from groundwater wells tapping deep confined aquifers beneath the Gulf Coastal Plain. The supply draws from either the Chicot Aquifer or the Sparta Aquifer, both consisting of unconsolidated deltaic sands deposited during the Pleistocene and Miocene epochs far below the surface.

The underlying geology of the Gulf Coastal Plain in this region is characterized by deep, confined Pleistocene-Miocene deltaic sand formations. These unconsolidated sands are low in carbonate minerals, meaning groundwater passing through them dissolves very little calcium or magnesium. The result is a very soft water supply with low total dissolved solids, typical of confined coastal plain sand aquifers in Louisiana.

With very soft water, Hammond residents experience excellent soap lathering and minimal scale buildup in pipes, water heaters, and appliances. While scaling is not a concern, soft water can be slightly more corrosive to plumbing; regular monitoring of pipe condition is advisable. A water softener is not needed. Residents should consult the utility's most recent Consumer Confidence Report for current contaminant data, pH levels, and treatment details specific to the Hammond service area.

Geology & Source: Tangipahoa Parish, Gulf Coastal Plain — deep confined Pleistocene-Miocene deltaic sand aquifer (Chicot or Sparta Aquifer); unconsolidated sands with low mineral content produce very soft water with low TDS

Other Louisiana Water Reports

Mandeville

≈ 120–179 mg/L

🟠 Hard

Laplace

≈ 120–179 mg/L

🟠 Hard

Denham Springs

≈ 120–179 mg/L

🟠 Hard

Gonzales

≈ 120–179 mg/L

🟠 Hard

Report an Issue

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 Hammond's water safe to drink?

Yes. Hammond's water meets all federal safety standards. The hardness is ≈ 0–59 mg/L (Soft), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Hammond?

Hammond's water is soft at ≈ 0–59 mg/L. A water softener is generally not necessary, though a carbon filter can improve taste and remove any remaining chlorine.

How does Hammond compare to the USA average?

The USA national average is 151 mg/L. Hammond (≈ 0–59 mg/L) is 121 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 Hammond 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.