Longmont has multiple water providers: City Of Longmont Water and Left Hand Water. This page provides information about City Of Longmont Water.

The City of Longmont Water Division, under the City Public Works & Natural Resources Department, provides water for about 87,850 residents living in the Longmont area, Colorado. Established in 1885, the Longmont City Water collects supply from all surface water sources: 49% from the St. Vrain Creek watershed, and the rest of 51% from the Colorado and Fraser Rivers in Grand County, via the Colorado-Big Thompson (C-BT) project, operated by the Northern Colorado Water Conservancy District.

Longmont Drinking Water Quality

Consumer Confidence Water Quality Reports

Under the authority of the Safe Drinking Water Act, the EPA requires Longmont City Water to assess local water quality each year and distribute a Consumer Confidence Water Quality Report. At WaterZen, we review these reports and make the information available, in a concise, straightforward, and easy-to-understand way.

A-

Excellent

WaterZen Rating

Lead levels in the drinking water of some cities across the United States are too high, potentially creating public-health issues for the people living in those areas.

What about City Of Longmont Water? How much lead is in your drinking water? And how do those levels compare to other cities in the state? We examined data from hundreds of cities across the nation to understand and grade your water quality.

As you can see, City Of Longmont Water received the best-possible grade because the amounts of contaminants found in the water supply were better than the Public Health Goal and most other water providers we've analyzed.

Longmont has multiple water providers: City Of Longmont Water and Left Hand Water. This page provides water quality information for City Of Longmont Water.

A-

Excellent

WaterZen Rating

Lead levels in the drinking water of some cities across the United States are too high, potentially creating public-health issues for the people living in those areas.

Longmont has multiple water providers: City Of Longmont Water and Left Hand Water. This page provides water quality information for City Of Longmont Water.

Contact Longmont City Water Customer Service

Have a Question, Issue or Comment?

Main Customer Service

Physical Address:
375 Airport
Longmont, Colorado 80503

303-651-8416
"No email provided. Please visit the contact form." (https://www.longmontcolorado.gov/departments/departments-n-z/water/contact-water/-sortn-SEmail/-sortd-asc)

Emergency (24 hours - broken water main or pipeline, etc.)
303-651-8416

Pay Your City Of Longmont Water Bill

Already have an account?

If you already have an account, you just need to login to the City Of Longmont Water site. City Of Longmont Water accepts credit cards, debit, and direct deposit. Click here to login.

Want to create a new account?

You can create a new account on the City Of Longmont Water website. Once you create the account, you can setup payment with credit, debit, or direct deposit. Click here to create an account.

Want to pay without an account?

You can make a one-time payment without creating an account. You will need to have your credit or debit card in order to make the one time payment. Click here to make a one time payment.

How to Start Longmont Water Service

Starting Your Service

When you move to a new home in Longmont, you'll most likely already have running water, but you'll still need to set up water service with the City Of Longmont Water. Luckily, Longmont has made it pretty simple with the following online form. Starting service generally takes just two business days.

Click here to fill out a Start Service Form.

Stopping Your Service

When you move out of a home in Longmont, you'll need to stop your water service with the City Of Longmont Water, so you don't keep getting billed. Simply fill out the following online form. Stopping service normally takes just two business days.

Click here to fill out a Stop Service Form.

Latest Updates