The City of Thornton Water, under the City Infrastructure Department, provides water for about 152,248 residents living in the Thornton area. Established in 1956, Thornton’s drinking water originates as snow melt in the Rocky Mountains. The city uses two water sources for our drinking water: the South Platte River and Clear Creek. Water from the South Platte River is diverted into our network of gravel lakes. Water from Clear Creek is diverted and stored mostly in Standley Lake.

Thornton City Drinking Water Quality

Consumer Confidence Water Quality Reports

Under the authority of the Safe Drinking Water Act, the EPA requires Thornton 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.

B+

Good

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 Thornton 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 Thornton Water received an above-average grade because the amounts of contaminants found in the water supply were lower than most other water providers we've analyzed.

B+

Good

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.

As you can see, City of Thornton Water received an above-average grade because the amounts of contaminants found in the water supply were lower than most other water providers we've analyzed.

Contact Thornton City Water Customer Service

Have a Question, Issue or Comment?

Main Customer Service

Physical Address:
9500 Civic Center Drive
Thornton, Colorado 80229

303-538-7370
water@thorntonwater.com

Emergency (24 hours - broken water main or pipeline, etc.)
720-977-6500

Pay Your City of Thornton Water Bill

Already have an account?

If you already have an account, you just need to login to the City of Thornton Water site. City of Thornton 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 Thornton 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 Thornton Water Service

Starting Your Service

When you move to a new home in Thornton City, you'll most likely already have running water, but you'll still need to set up water service with the City of Thornton Water. Luckily, Thornton 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 Thornton City, you'll need to stop your water service with the City of Thornton 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.

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