Castle Rock Water

Securing our future drop by drop

In 1900, the Castle Rock Journal highlighted our role as a leader in long-term water planning and conservation. After 130 years, Castle Rock Water continues this leadership role and takes
to heart its responsibility to protect and preserve the Town's precious resource.

We take our mission very seriously - to provide our community with exceptional service that protects public health and balances social, environmental and fiscal responsibilities in a sustainable manner.
Modern day water pipes

About us

Castle Rock Water is municipally-owned and provides three distinct water services - drinking water, wastewater and stormwater.

Drinking water

Our drinking water service consists of several treatment plants and the distribution systems to provide safe, reliable water to Town residents and businesses.

Water service includes acquiring the sources of water and ensuring supply for our customers now and in the future. As part of this service, we also protect public health by providing safe drinking water and sufficient supplies for fire safety.


Wastewater is the proper conveyance and treatment of the used water from homes and businesses. Castle Rock Water manages the sewer lines and systems for wastewater in the Town and is a directorial partner in the regional wastewater treatment facility.


Castle Rock Water also manages stormwater which is the rainfall, snow melt and runoff that flows through our community. Stormwater management minimizes flooding and maintains water quality. 

Learn more

We welcome an engaged community and invite our customers to stay informed with how Castle Rock Water serves our community and is making huge strides in ensuring a strong water future.

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Award winning service

We take great pride in our service and our goal is to be a national leader among water utilities, focused on customer satisfaction and delivering outstanding quality and value. The following accomplishments show we are on our way!

  • Pursuing Excellence - Gold 2016, 2017 and 2018

    First water provider in the state to earn the highest ranking by the Colorado Department of Public Health and Environment for actions taken for going above and beyond regulatory compliance.
  • Environmental Leadership Program – Gold 2018

    Awarded by the Colorado Department of Public Health and Environment to companies voluntarily going beyond compliance with state and federal regulations, increasing sustainability and commitment to continual environmental improvement.Our sustainability efforts and Environmental Policy identify our focus toward environmental stewardship and sustainability.
  • Region Water Taste Test - 1st in 2015, 2nd in 2016

    Castle Rock continues to be one of the best tasting waters in the region as recognized by the Rocky Mountain Section (Colorado, New Mexico, Wyoming) American Water Works Association.
  • Excellence in Operations Management - Cartegraph 

    National customer recognition for implementation and cost savings parameters.
  • Town of Castle Rock Environmental Design Award 

    Awarded for instituting green energy practices in construction and operation of the Plum Creek Water Purification Facility.
  • American Council of Engineering Companies - Engineering Excellence Merit Award

    Excellence in the design and performance of the Plum Creek Water Purification Facility.

Focusing on the future

Securing long-term water for our future, drop by drop, is one of the most important goals that we strive to meet, and work towards every day.

Today, a large quantity (approximately 85 percent) of the Town's annual water supply comes from nonrenewable Denver Basin groundwater while only a small portion (approximately 15 percent) comes from renewable supplies along East Plum Creek. The nonrenewable Denver Basin groundwater won’t last forever, so it’s important that we continue moving to a renewable water supply. Renewable water is more sustainable in the long run and hedges against drought conditions.

In accordance with our current plan, we are meeting our goals to reach a 75 percent renewable water supply by the year 2050. This long-term planning includes acquiring storage, importing water, utilizing local sources, protecting groundwater supplies and conserving usage. Learn more about our long-term renewable water plan.