New Rochelle, New York

New Rochelle, New York New Rochelle, New York

Water Quality in New Rochelle, New York

Watershed: East Creek – Mamaroneck Harbor

What is the water quality like in New Rochelle, NY?

Let’s dive deeper into what’s in New Rochelle water.

What’s in New Rochelle water?

Here are the top 5 chemical compounds in your water and what health issues they can potentially cause:

  1. Bromodichloromethane – Potential effect: Cancer
  2. Chloroform – Potential effect: Cancer
  3. Haloacetic acids – Potential effect: Cancer
  4. Radium – Potential effect: Cancer
  5. Total trihalomethanes – Potential effect: Cancer

These are five of the 21 contaminants analyzed by the Environmental Working Group (

9 of these contaminants are rated as exceeding EWG Health Guidelines.

See the What Can You Do? section below for all of the contaminants you can filter out and how to do it.

Where does New Rochelle’s water come from?

New Rochelle’s water comes from the East Creek – Mamaroneck Harbor watershed.

8 of the 9 EPA assessed water sources in the East Creek – Mamaroneck Harbor watershed are in Impaired or Unknown condition. These include:

  • Burling Brook and its tributaries
  • Eastchester Bay
  • Echo Harbor – Premium Millpond
  • Larchmont Harbor
  • Mamaroneck Harbor
  • Milton Harbor – Lower Blind Brook
  • New Rochelle Harbor
  • Otter Creek – Mill Pond and its tidal tributaries

Ideally, a water source would be rated in Good condition. Huguenot Lake’s water quality is Good.

Whether a water source is in Impaired or Good condition refers to the quality of these uses:

  1. Drinking Water
  2. Aquatic Life
  3. Fish and Shellfish Consumption
  4. Recreation

Learn more from How’s My Waterway

See below for what you can do to improve New Rochelle’s water.

Conclusion – What Can You Do?

Information about water quality can be surprising.

But there’s no reason to lose hope. There are things you can do in your household as well as things you can do at a community level.

In Your Household:

*Chlorination is an effective method of disinfecting/treating drinking water. You can then use a water filter to reduce the effects of chlorination byproducts to get the safest, cleanest water possible.

In Your Community:

Contact your local government officials and put pressure on them to invest in cleaner waterways and upgraded city water filtration and treatment.

Go to: to find contact information for your local officials.

Water Quality in Other New York Cities

New York Water Quality Page

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