Ecolab’s Carson, California Plant Certified as Water Stewardship Leader

Ecolab’s Carson, California Plant Certified as Water Stewardship Leader

Alliance for Water Stewardship (AWS) Case Study
Published December 2016 | Updated October 3, 2023


Ecolab’s manufacturing facility located in Carson, California, is a blend plant that primarily produces water treatment chemical blends, polymers, oil blends, antimony and paper additives. Located in Southern California, the Carson plant relies on water from the California Water Service Company, which sources water from Northern California and the Colorado River. Other water sources include local groundwater and recycled water from the manufacturing plant itself. Ecolab’s Carson plant location resides in the Greater Los Angeles County Watershed, specifically in the San Gabriel sub-basin.

In alignment with Ecolab’s commitment to a holistic approach to water management across its manufacturing facilities, the company decided to implement the Alliance for Water Stewardship (AWS) International Water Standard at its Carson plant in 2016 and version 2.0 in 2020. The facility has continued to stay up to date on AWS requirements to uphold the core certification.


The team at Ecolab’s Carson plant assessed the facility for opportunities to reduce water use across its operations by 13%  per ton of product by 2022, from a 2018 baseline. Building on previous improvement projects, the plant prioritized installation of volumetric flow meters, optimization of the washout water programme, reduction of landscaping water, review and relaunch of the on-site water safety plan and implementation of a dry floor policy.

Feasibility studies were performed to chart the water reduction impact, capital and operating cost of solutions. Ecolab’s Water Risk Monetizer was also utilized to understand the water risk at the plant and implementation of water reduction projects was prioritized throughout the plant to achieve savings. Of the five water outcomes of the AWS Standard, the Carson facility concentrated on sustainable water balance and good water quality status, and will be ramping up focus on safe water, sanitation and hygiene (WASH) practices.

annual savings infographic

With the aim to improve overall health of local watersheds, and as part of Ecolab’s 2030 Impact Goals, we have prioritized AWS certification in high-risk watersheds in which we operate.

AWS Certification Plant Imagery

An average annual water reduction of 419,000 gallons (1580 m3) – the equivalent to $11,100 USD in risk-adjusted cost savings.


The following projects help improve the facility’s water balance and have been completed to reduce overall water use:

  • Installation of volumetric flow meters on the boiler feedwater tank, reverse osmosis unit, cooling tower and deionized water system to better track on-site water use. Additional flow meters were installed in 2021.
  • Implementation of an idea collection system to gather water-saving ideas from all plant employees. This encourages all associates to view water as a shared resource and drives collective action that feeds into water-savings discussions during monthly business reviews.
  • Continuous improvement of the washout water programme to capture and reuse the first rinse for 75% of manufactured products, resulting in water savings of 131,000 gallons (496m3) per year.
  • Reduction of water for landscaping use by 75%.
  • Review and relaunch of the on-site water safety plan.
  • Optimization of production scheduling to minimise washouts between batches, which saves approximately 13,000 gallons (49 m3) of water annually and over 130 hours of labour.
  • Enactment of a dry floor policy to reduce the amount of washdown that occurs during filling, which results in 15,000 (57 m3) gallons of water savings every year.

The following projects are in progress:

  • Launch of a steam leak identification programme, resulting in replacement of multiple steam pumps and steam traps to reduce water and energy use. Expert consultation and evaluation in progress.
  • Additional reduction of water use in landscaping.

Ecolab's Carson, CA, Plant Location


  • Positive Water Impact | Average annualized water reduction of 419,000 gallons (1580 m3) resulting in a 3% reduction of water use per ton of product realized in 2022 from a 2018 baseline.
  • Economic Results | $11,100 USD average annualized risk-adjusted cost savings. 
Graph showing water withdrawal and water intensity decreasing from 2018 to 2022

Water Governance

At the plant level, the Plant Manager is responsible for overall wastewater compliance and compliance with wastewater permits, and accountable for wastewater discharge and PH monitoring. Maintenance Supervisor is responsible for wastewater testing, wastewater discharge and PH monitoring. Plant Manager is ultimately accountable for overall wastewater compliance, wastewater testing, regulation updates, wastewater discharge and PH monitoring.

At a corporate level, the Sustainability Team is guided and advised by the Sustainability Executive Advisory Team, which is made up of the company’s most senior business and divisional leaders. In addition, Ecolab’s Water Stewardship position and Global SHE position are publicly available and serve as commitments to and guidance on water-related issues and compliance. Site water-related compliance information is available upon request.

In 2020, Ecolab announced its membership in the Water Resilience Coalition, an industry-driven initiative of the United Nations Global Compact’s CEO Water Mandate. The Coalition aims to elevate global water stress to the top of the corporate agenda and preserve the world’s freshwater resources through collective action in water-stressed basins and by making ambitious, quantifiable commitments.

Water Stewardship Journey

In addition to internal operational improvements, Ecolab’s Carson plant’s water stewardship activities are ongoing. Shared challenges between the plant and relevant, local stakeholders include water scarcity due to reduced snowpack from existing water sources, aging water infrastructure, urban water runoff, saline intrusion into groundwater and loss of wetlands and species. To address these shared issues, Ecolab collaborates with other water users in the basin, one of which is an Ecolab AWS-certified plant in City of Industry (COI) California.

Local water stewardship activities outside of the plant include continued engagement with the water utility company, Calwater, to maintain alignment on catchment water goals. Ecolab is involved in the California Water Action Collaborative (CWAC) and is also part of the South Coast working group (within CWAC). The Ecolab team participates in monthly meetings to keep pace on shared water challenges and efforts in California. Ecolab is actively seeking collective action projects in the region that align with corporate replenishment goals. 

Ecolab is a member of a public policy water resources group in Washington D.C. that advocates for water resource policy with a heavy focus in California. In 2022, Ecolab continued to engage with and support the Alliance for Water Stewardship’s global work by sharing the company’s water stewardship strategy through multiple speaking engagements, AWS webinars and encouraging other large multinational corporations to join AWS.


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