Potable Water Supply

Within Frederick’s town limits, there are three entities involved with public potable water supply (water fit for consumption by humans and other animals). Those suppliers are the Town of Frederick, Central Weld County Water District, and Left Hand Water District. All residents on the east side of I-25 are Town of Frederick customers.  

New Residents

If you are a new resident living on the east side of I-25 you are a Town of Frederick water customer. Instructions for setting up utility billing for your new residence can be found here. If you are a resident living on the west side of I-25 you are a customer of Left Hand Water District. For questions regarding utility billing from Left Hand Water District please visit their website

Outside Suppliers

For certain areas where the town’s distribution system has not been extended, such as Frederick West Business Park, Central Weld County Water District  (CWCWD) provides service from their transmission mains. Left Hand Water District supplies all public potable water demand on the west side of Interstate 25 (I-25).

Colorado-Big Thompson Project

The Town’s potable water supply comes from Colorado River water delivered to Carter Lake through the Colorado-Big Thompson Project.

This high-quality source water is treated by CWCWD’s treatment and storage facilities located west of Berthoud, Colorado. A high-pressure CWCWD transmission main transports water to the town’s distribution mains through a number of master meters from which point the town’s water distribution system begins.

Future Potable Water Supplies

To avoid expensive capital investments and to be good stewards of limited natural resources, the town encourages water conservation through financial and educational means. In order to secure adequate supplies of high-quality water for the Town’s current and future potable supplies, Frederick is one of 15 Northern Colorado water providers involved with: 

Northern Integrated Supply Project (NISP)

Windy Gap Firming Project - Chimney Hollow Reservoir

Raw Water

The Town of Frederick has implemented a Raw Water System (RWS) for irrigation to complement the town’s potable water system. The Raw Water System supply is fed from the Lower Boulder Ditch and stored in Milavec Lake. Untreated, non-potable, water is pumped out of Milavec Lake to supply three irrigation ponds on Town property. Two ponds are located on the Bella Rosa Golf Course and the third is located in Centennial Park. 

September 8, 2020: What's up with the low water level at Milavec Lake? Think of the lake as a water storage area. In the spring, the lake is filled with water for summer irrigation programs. For example, lake water supplies the sprinklers in our parks. With an expanding raw water irrigation system and hot conditions, more water comes out of the lake, causing the water level to drop. Restrictions determine what water sources can be stored in the lake and when the water sources are available for storage. This is why you see the water level start high in the spring, drop in the summer, and then rise again in the fall.

Raw Water System Expansion

The Town has plans to expand the RWS to a majority of the Town limits. New developments are installing raw water lines to use raw water to irrigate the shared open space and parks. The Town plans to add raw water distribution lines into additional developments as funds allow.  There are also plans to develop the Town’s raw water irrigation facilities on the west side of I-25 which the Town has discussed with Left Hand Water District.