Testing water hardness in Memphis, TN — 5–7 gpg moderately hard municipal water
Memphis water tests at 5–7 gpg — below the US national average of ~10 gpg. A softener is optional, not urgent.
Quick Answer: Memphis water is Moderately Hard, averaging 5–7 gpg (85–119 ppm). That is below the US national average of ~10 gpg. Memphis draws from Memphis Sand Aquifer (artesian groundwater). Optional. At 5–7 gpg, scale buildup is mild. Many homeowners skip a softener and use a showerhead filter + rinse aid in the dishwasher. A softener is worth it if you have a tankless heater or eczema-prone skin.

Memphis Water Hardness at a Glance

Memphis, TN — Water Hardness Data

Hardness Range5–7 gpg (85–119 ppm)
ClassificationModerately Hard
US National Average~10 gpg (171 ppm)
Primary Water SourceMemphis Sand Aquifer (artesian groundwater)
Water ProviderMemphis Light Gas and Water (MLGW)
Softener Recommended?Optional

Why Is Memphis Water Moderately Hard?

Memphis is exceptional among US cities: it draws from the Memphis Sand Aquifer, a deep artesian aquifer of clean, well-sorted sand that was deposited during the Eocene epoch. Unlike limestone aquifers, sand aquifers dissolve very few minerals into water. The result is some of the softest water of any major American city east of the Mississippi — naturally filtered and low in calcium and magnesium.

The USGS classifies Memphis's 5–7 gpg as Moderately Hard — notably soft for a Southern city.

How Memphis Compares to Other Major Cities

CityHardness (gpg)Classification
Memphis, TN (this city) 5–7 gpg Moderately Hard
Las Vegas, NV 16–17 gpg Very Hard
Phoenix, AZ 16–18 gpg Very Hard
Indianapolis, IN 14–16 gpg Very Hard
Chicago, IL 8–11 gpg Hard
Atlanta, GA 7–9 gpg Moderately Hard
Denver, CO 4–6 gpg Moderately Hard
Seattle, WA 1–3 gpg Soft
Vancouver, BC 0.3–0.6 gpg Soft
US National Average~10 gpgHard

Advantages of Soft Water in Memphis

At 5–7 gpg, Memphis's moderately hard water comes with real household benefits:

💡 Check Your Exact Hardness: Hardness can vary by neighbourhood and distribution zone. Memphis Light Gas and Water (MLGW) publishes annual Consumer Confidence Reports with exact hardness data. Well water users should test annually — groundwater hardness varies significantly from municipal supply.

Water Treatment Options for Memphis

At 5–7 gpg, a whole-home softener is optional. The EPA Consumer Confidence Report program requires Memphis Light Gas and Water (MLGW) to publish annual contaminant data. If you're concerned about PFAS, chlorine, or disinfection byproducts, a filter addresses those independently of hardness.

AquaBliss High Output Filtered Showerhead

Reduces chlorine, scale, and sediment · Easy install · Great for Memphis's moderately hard water without a full softener commitment

~$30–50

Check Price on Amazon →

Whirlpool WHES30E Water Softener — If You Go the Softener Route

Right-sized for moderately hard water · Demand-initiated regeneration · Available at Home Depot · Good for 1–3 person households

~$380–480

Check Price on Amazon →

Water Hardness Test Kit — Know Your Exact GPG

Especially useful near city service boundaries or for well water · Simple test strips · Results in 60 seconds

~$10–15

Check Price on Amazon →

See our best PFAS water filters guide and how to test water hardness at home for more options.

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💧 Free: The Hard Water Home Guide

Softener sizing, descaling schedules, and what to test — tailored to moderately hard water like Memphis's 5–7 gpg.

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Memphis Metro Area — Water Hardness Nearby

Nashville Tn10–13 gpg · Very Hard
St Louis Mo8–12 gpg · Hard
Birmingham Al6–9 gpg · Moderately Hard
Little Rock Ar5–8 gpg · Moderately Hard
New Orleans La6–8 gpg · Moderately Hard

Frequently Asked Questions — Memphis Water Hardness

Is Memphis water hard or soft?
Memphis water is Moderately Hard, averaging 5–7 gpg (86–120 ppm). This is below the US national average of ~10 gpg. Memphis draws from Memphis Sand Aquifer (artesian groundwater).
What is the water hardness in Memphis, TN?
Memphis water hardness is approximately 5–7 gpg (86–120 ppm), classified as Moderately Hard. Memphis Light Gas and Water (MLGW) publishes annual water quality data in its Consumer Confidence Report at www.mlgw.com.
Why is Memphis water moderately hard?
Memphis water falls in the moderate range because of its source geology: Memphis Sand Aquifer (artesian groundwater). The watershed has moderate mineral content — not as hard as limestone aquifer cities, not as soft as mountain granite watersheds.
Do I need a water softener in Memphis?
Optional. At 5–7 gpg, scale buildup is mild. Many homeowners skip a whole-home softener and use a showerhead filter or occasional descaling instead.
Does Nashville Tn have similar water hardness to Memphis?
Nashville Tn has water hardness of approximately 10–13 gpg — classified as Very Hard. The two cities have different hardness levels due to different water sources and geology. See the Nashville Tn water hardness guide for details.
How does Memphis water hardness compare to St Louis Mo?
Memphis averages 5–7 gpg (Moderately Hard), while St Louis Mo is approximately 8–12 gpg (Hard). The difference is due to different water sources and underlying geology. See the St Louis Mo water hardness guide.

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