37155 Water Hardness: Hard — Montgomery County, TN

What This Means

Montgomery County, Tennessee has hard water, estimated at 148.9 mg/L (PPM). Hard water causes noticeable mineral scale on faucets, showerheads, and inside water heaters. You may notice spots on dishes, stiff laundry, and dry skin or hair. A water softener is recommended to protect your plumbing and appliances.

What You Should Do

1

A water softener is recommended. At 148.9 ppm, scale buildup will affect your water heater, dishwasher, and plumbing over time.

2

Test your water with strips to confirm. Our estimate is based on USGS county data — a $5–15 test strip kit from a hardware store will verify your exact tap water hardness.

3

Consider a whole-house ion exchange system ($800–2,500). This will remove calcium and magnesium, protecting all appliances and making a noticeable difference in skin, hair, and cleaning.

Hardness Details

ZIP Code	37155
County	Montgomery
City	—
State	Tennessee (TN)
Hardness (PPM)	148.9 mg/L — Hard
Hardness (GPG)	8.7 grains/gallon
Classification	121 - 180 mg/L

Source: USGS Water Quality Portal, county-level median

USGS Monitoring Data

Monitoring Stations	45
Range	0.1 – 881 mg/L
Most Recent Data	2023
Data Quality	Measured

Source: USGS Water Quality Portal

Effects at 148.9 PPM Hardness

At 148.9 ppm, expect noticeable effects: soap scum buildup on fixtures and shower doors, cloudy spots on dishes, dry skin and hair after bathing, and reduced water heater efficiency. Laundry may feel stiff, and you will likely need more detergent for effective cleaning.

Is Montgomery County Water Safe to Drink?

Yes. Hard water at 148.9 ppm in Montgomery County is safe to drink. The calcium and magnesium that make water hard are actually essential minerals your body needs daily. The World Health Organization confirms there are no health-based guidelines for water hardness.

You may notice a slightly mineral or chalky taste at this hardness level. A drinking water filter (pitcher-style carbon filter or under-sink reverse osmosis system) can improve taste if desired, though the water remains perfectly safe to drink unfiltered.

Your Water vs National Average

Montgomery County water at 148.9 ppm is 49% harder than the US average of approximately 100 ppm. This means your area has harder water than most of the country, and a water softener would provide more benefit here than in an average American home.

Best Solution for 148.9 PPM Water

A whole-house water softener is recommended ($800–2,500 installed). At 148.9 ppm, an ion exchange softener will protect your water heater, dishwasher, and plumbing from scale buildup. You will also notice improved skin and hair health, softer laundry, and reduced soap and detergent usage. The system typically pays for itself within 3–5 years through energy savings and extended appliance life.

Montgomery County Water Hardness Map

Soft Moderate Hard Very Hard

Frequently Asked Questions

What is the water hardness for ZIP code 37155?

ZIP code 37155 is in Montgomery County, Tennessee, with estimated water hardness of 148.9 mg/L (8.7 GPG), classified as hard.

Do I need a water softener in 37155?

With hard water at 148.9 PPM, a water softener is recommended to protect your plumbing and appliances from mineral scale buildup.

What county is ZIP code 37155 in?

ZIP code 37155 is in Montgomery County, Tennessee (TN).

Is Montgomery County water hard or soft?

Montgomery County water is classified as hard with an estimated hardness of 148.9 ppm (8.7 GPG). This is hard water — you may notice scale buildup, dry skin, and spots on dishes.

Is hard water in 37155 safe to drink?

Yes, hard water in ZIP code 37155 at 148.9 ppm is safe to drink. The calcium and magnesium minerals are actually beneficial for your health. You may notice a slightly mineral taste. A simple carbon or reverse osmosis filter can improve taste if desired, but the water is perfectly safe unfiltered.

Will 148.9 PPM water damage my appliances?

At 148.9 ppm (hard), scale buildup will reduce water heater efficiency and can shorten appliance lifespan. A water softener is recommended to protect your investment.

Do I need a water softener in Montgomery County?

Yes — Montgomery County has hard water at 148.9 ppm. A water softener ($800-2,500 installed) is recommended to protect plumbing and appliances.

Is Montgomery County water OK for aquariums and plants?

Use caution. At 148.9 ppm, soft-water fish species may struggle. Consider using filtered water for aquariums. For plants, hard water can raise soil pH — use rainwater or filtered water for acid-loving species.

ZIP Code 37155