# NYC Water Systems by My Home Water System

> Published water hardness for New York City, NY, 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, NYC DEP: Average 32 mg/L (2 grains per gallon), range 18-100 mg/L (Calendar year 2025). Source: New York City Drinking Water Supply and Quality Report 2025, https://www.nyc.gov/assets/dep/downloads/pdf/water/drinking-water/drinking-water-supply-quality-report/2025-drinking-water-supply-quality-report.pdf
- USGS class, our reading of the published figures: soft to moderately hard. Classes: https://www.usgs.gov/water-science-school/science/hardness-water
- New York City disinfects with chlorine, and Croton water also gets ultraviolet light. The 2025 report does not mention chloramine. Source: NYC 2025 Drinking Water Supply and Quality Report, https://www.nyc.gov/assets/dep/downloads/pdf/water/drinking-water/drinking-water-supply-quality-report/2025-drinking-water-supply-quality-report.pdf
- New York City water comes from upstate reservoirs: the Catskill and Delaware systems supplied 91.3 percent in 2025 and the Croton system 8.7 percent. Source: NYC 2025 Drinking Water Supply and Quality Report, https://www.nyc.gov/assets/dep/downloads/pdf/water/drinking-water/drinking-water-supply-quality-report/2025-drinking-water-supply-quality-report.pdf
- Sources last checked: 2026-10-27

## Pages
- [New York City water and quotes](https://nycwatersystems.com/): the answer, the sources, common questions
- [Water data as JSON](https://nycwatersystems.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.