Castle Rock Water

Billing System and Online Portal Upgrade

  1. Castle Rock Water's new billing system and online portal are now available - customers with online accounts must visit Water Bill Account page to update their accounts and reenter payment information.

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. Our extensive planning, our daily operations, and our goals hinge on this principle.

Water staff working in the field
Modern day water pipes

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!

  • Outstanding Water Treatment Plant - 2021
    Awarded by the American Water Works Association / Rocky Mountain Section for Advanced Treatment expansion to the Plum Creek Water Purification Facility.
  • Commitment Award - 2020
    First recipient of this recognition from the regulatory agency, Colorado Department of Public Health and Environment for exceptional service to the community.
  • Environmental Leadership Program - Gold 2017 to 2020
    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.
  • Pursuing Excellence - Gold 2016 to 2019
    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.
  • 24 Karat Gold Environmental Leadership award - 2021 to Mark Marlowe and Castle Rock Water staff for implementation of reuse water as a supply
  • Water Treatment Plant Maintenance award - 2021 from American Water Works Association / Rocky Mountain Section
  • Engineering Excellence - 2021 from American Council of Engineering Companies for Burns and McDonnell's design of Advanced Treatment at PCWPF
  • Best Projects (Water/Environment) from Engineering News Review Mountain States for Burns and McDonnell's design of Advanced Treatment at PCWPF

About Us

Castle Rock Water is municipally-owned and provides three distinct water services - drinking water, wastewater and stormwater. Though a part of the Town of Castle Rock, the water provider is funded solely through rates and fees. Having one water provider for all water service provides consistency and reliability for service with an integrated approach for efficiencies.

Drinking Water

Our drinking water service consists of several treatment plants including our flagship, Plum Creek Water Purification Facility which was expanded to include Advanced Treatment in 2020 and ensures safe and 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 as is flows through the community.

Five-Year Strategic Plan 2019 to 2023

Planning is what ensures the Town has a sustainable water future, especially given changes in growth, economic conditions and climate. The Five-Year Strategic Plan is a detailed framework that will help guide Castle Rock Water in meeting the needs of a growing community with a focus on advancements in technology and full utilization of the resources of the department. The plan focuses on these key strategies.

  • Strategy 1: Ensure long-term water
  • Strategy 2: Support, engage and inspire our team
  • Strategy 3: Enhance customer satisfaction
  • Strategy 4: Maintain financial sustainability
  • Strategy 5: Optimize infrastructure
  • Strategy 6: Demonstrate industry leadership

View a copy of the strategic plan (PDF).