# Nashville Water Systems by My Home Water System

> Published water hardness for Nashville, TN, copied from the utility's own reports, and a way to request a written water treatment quote from one local company. Not a water utility.

## Water facts, as published
- Total hardness, Metro Water Services: 100.5 mg/L, range 88.5-128.4 mg/L (2023 data, in the 2025 report). Source: 2025 Consumer Confidence Report, https://www.nashville.gov/sites/default/files/2026-05/2025_Consumer_Confidence_Report-FINAL.pdf?ct=1777986674
- Calcium hardness, Metro Water Services: 75.3 mg/L, range 63.9-92.6 mg/L (Undated row, 2025 water quality report). Source: 2025 Water Quality Report (Nashville Metro Water Service PWSID TN0000494), https://www.nashville.gov/sites/default/files/2026-04/Water_Quality_Report-2025.pdf?ct=1777578711
- USGS class, our reading of the published figures: moderately hard to hard. Classes: https://www.usgs.gov/water-science-school/science/hardness-water
- Metro Water Services calls Nashville's water moderately hard. Calcium hardness is only part of total hardness.
- Metro Water Services disinfects with a small amount of bleach, a form of chlorine, averaging 1.60 ppm in its 2025 report. Source: Metro Water Services 2025 Consumer Confidence Report, https://www.nashville.gov/sites/default/files/2026-05/2025_Consumer_Confidence_Report-FINAL.pdf?ct=1777986674
- Metro Water draws from the Cumberland River and treats it at the K.R. Harrington and Omohundro plants. Source: Metro Water and Sewerage Services Annual Disclosure FY2025, https://www.nashville.gov/sites/default/files/2026-05/Metro_Water_and_Sewerage_Services_Annual_Disclosure_FY2025.pdf?ct=1778591132
- Metro Water serves most of Davidson County, but several separate utility districts, such as Harpeth Valley Utility District, also operate inside the county, so check your bill. Source: Metro Water and Sewerage Services Annual Disclosure FY2025, https://www.nashville.gov/sites/default/files/2026-05/Metro_Water_and_Sewerage_Services_Annual_Disclosure_FY2025.pdf?ct=1778591132
- Sources last checked: 2026-10-27

## Pages
- [Nashville water and quotes](https://nashvillewatersystems.com/): the answer, the sources, common questions
- [Water data as JSON](https://nashvillewatersystems.com/water.json)
- [Water softeners](https://www.myhomewatersystem.com/water-softeners/), [whole-home filtration](https://www.myhomewatersystem.com/whole-home-filtration/), [reverse osmosis](https://www.myhomewatersystem.com/reverse-osmosis/)
- [Hard water by city](https://www.myhomewatersystem.com/hard-water-by-city/): published hardness for every city we cover

## Status
- Not taking requests yet. No prices are published; quotes come after an assessment at the home.
- Run by My Home Water System, operated by Aidren LLC.