Published December 2016 | Updated August 2025
Ecolab’s Carson, California, Plant
Alliance for Water Stewardship (AWS) Standard Case Study
Insights
As a global leader in water solutions and services, Ecolab remains dedicated to creating a more water-secure future through smart water management, conservation, and stewardship. By 2030 we plan to achieve a Net Positive Water Impact through:
- Reducing, recycling and replenishing water at operational sites. We aim to reduce water impact by 40% per unit production across our enterprise from a 2018 base year.
- Protecting local watersheds by working to restore greater than 50% of our absolute water withdrawal volume at high-risk sites.
- Delivering outcomes through the Alliance for Water Stewardship (AWS) Standard by achieving AWS certification for Ecolab manufacturing sites located in high-risk watersheds.
Ecolab’s manufacturing facility, located in Carson, California, is a key contributor to these goals. The Carson plant primarily produces water treatment chemical blends, polymers, oil blends, antimony and paper additives. Ecolab’s 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 from the main San Gabriel basin 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. Water is treated and then discharged from the Joint Water Pollution Control Plant (JWPCP) in Carson. The treated water from the JWPCP is sent to the Pacific Ocean off the Palos Verdes Peninsula.
Actions
To contribute to Ecolab’s enterprise water goals, the local team’s objective is to reduce annual water use per ton of product by 40% from 2018 to 2030.
The following projects help improve the facility’s water balance and have been implemented 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.
- Installation of Ecolab’s 3D TRASAR™ Technology in cooling towers and boilers.
- 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 program to capture and reuse the first rinse of manufactured products.
- Reduced use of water use for landscaping.
- Review and relaunch of the on-site water safety plan.
- Automated tank washout and optimization of production scheduling to minimize washouts between batches.
- Enactment of a dry floor policy to reduce the amount of washdown that occurs during filling.
Outcomes
As a result of these actions, the Carson plant achieved savings in water and energy use. The improvements made at the site have proved to be a helpful step forward for enhancing the site’s operations and advancing Ecolab’s sustainability goals.
Featured Solutions
Leveraging Ecolab solutions and digital technologies help the Carson manufacturing facility
reduce, reuse and recycle water.
To improve the overall health of local watersheds, and as part of Ecolab’s efforts to create 2030 Positive Impact, we have prioritized AWS certification in high-risk watersheds in which we operate.
Good Water
Governance
✓
Sustainable Water
Balance
✓
Good Water
Quality Status
✓
Important Water-Related Areas
✓
Water Sanitation and
Hygiene (Wash)
✓
Water Stewardship Journey
Ecolab is committed to sustainable water use in our facilities and collaboration with other businesses at the local level. 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. In 2024, Carson joined City of Industry (COI) and Placentia as the first multi-site AWS certification in the United States.
To identify shared water challenges in the San Gabriel sub-basin, a comprehensive risk assessment was performed leveraging insights from Ecolab® Water Navigator IQ™ and the World Resources Institute (WRI) Aqueduct Atlas to identify shared and site-level water challenges.
Ecolab’s water stewardship approach aims to make a positive impact within our operations and on the water challenges within the communities in which we operate. Primary 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, water quality, groundwater overdraft, saline intrusion into groundwater and loss of wetlands and species. Additional shared challenges include seismic risk, wildfires and flooding. To address the primary shared issues, Ecolab collaborates with other water users in the basin, including the AWS-certified Ecolab facilities in Placentia, California, and City of Industry (COI), California.
To effectively address these challenges, Ecolab’s water stewardship approach includes advancing progress toward the five outcomes outlined by the AWS standard. Ecolab strives for continuous improvement in the site’s water balance and water quality. Beyond our operations, our comprehensive strategy includes a focus on regional important water related areas (IWRA) and Water Sanitation and Hygiene (WASH). Continued progress across these key focus areas depends on robust water governance across the site and enterprise operations.
Using Ecolab® Water Navigator IQ™ to quantify the progress made against the five AWS outcomes, the Carson site is considered Water-Smart on the Water Maturity Curve. The Water Maturity Curve illustrates the quantified state of a site’s water strategy and management plan. A facility’s place on the curve is determined by a set of criteria that includes governance and strategy, target setting, water management practices and water stewardship. The criteria incorporate principles consistent with the five outcomes of the AWS framework, both emphasizing that strong water management includes continuous improvement and collaboration inside and outside the facility’s operations.
sustainable water balance
Sustainable Water Balance
Net Positive Water
A sustainable water balance and smart water management approach within our own operations is a critical component in achieving a localized net positive water impact. Aligned with the enterprise goals, the local team’s objective is to reduce the site’s annual water use per ton of product by 40% from 2018 to 2030. The team at Ecolab’s Carson plant assessed the facility for opportunities to decrease water use across operations to meet Ecolab’s targets to create 2030 Positive Impact. Implementation of water withdrawal reduction projects were prioritized based on risk probability and impact to site-level and community stakeholders.
water Quality
Water Quality
Water Quality Approach
To maintain good water quality of both process water and wastewater, internal daily water testing is conducted in addition to third-party wastewater testing every three months. Water used to rinse product tanks is optimized through a washout program and treated prior to entering the wastewater stream. Additional filters are used to further clean wastewater prior to sending it to the sanitation district.
If a spill or water-related issue were to occur, the site has a robust incident response plan that includes a root cause analysis of the original incident, a review by the leadership team, documentation in an internal reporting platform and communication of mitigation strategies during monthly site meetings. The site’s incident response plan includes an additional filtration step to remove any impurities in the rainwater prior to discharging into the storm drain.
Water Governance
Water Governance
Water Governance Approach
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. The maintenance supervisor is responsible for wastewater testing, wastewater discharge and pH monitoring. The plant manager is ultimately accountable for overall wastewater compliance, wastewater testing, regulation updates, wastewater discharge and pH monitoring. Site water-related compliance information is available upon request, including necessary corrective action taken by the site to prevent future occurrences. Additionally, Ecolab’s CDP Report discloses any violations and associated corrective actions.
At a corporate level, the corporate sustainability team is guided and advised by the Sustainability Executive Advisory Team (SEAT), which is made up of the company’s most senior business and divisional leaders. In addition, Ecolab’s Sustainability, Water Stewardship and Safety, Health and Environment (SHE) positions are publicly available and serve as commitments to and guidance on water-related issues and compliance. Ecolab’s Sustainability Position formalizes Ecolab’s global commitment to sustainability within the company and its impact on customers. Ecolab’s Water Stewardship Position reinforces Ecolab’s global commitment to responsible water stewardship by identifying opportunities for the company and its customers to use water resources in a manner that benefits business, communities and nature. Ecolab’s SHE Position outlines the company’s commitment to excellence in safety, health and environmental practices and performance across global operations.
Important Water Related Areas (IWRA) // Water, Sanitation and Hygiene (WASH)
Important Water Related Areas (IWRA)
Water, Sanitation and Hygiene (WASH)
Collective Action
In addition to internal operational improvements, Ecolab’s Carson plant’s external water stewardship activities are ongoing. To address these primary shared water challenges, Ecolab collaborates with other water users in the basin.
The Carson plant collaborates with its local water utility company, Calwater, and water district, West Basin Water District (WBWD), to cultivate and maintain working relationships with the catchment. They discuss shared water challenges, risk mitigation strategies, and initiatives within the catchment. The Carson team identified multiple volunteer and outreach events to participate in future years, including a watershed cleanup with the Huntington Beach Wetlands Conservancy. The Huntington Beach Wetlands are one of our identified IWRAs.
The regional Ecolab Foundation Nonprofit Grant Program, coordinated by the COI facility, has supported local nonprofits aligned with the focus areas of the Ecolab Foundation: Youth & Education, Civic & Community Development (basic needs: food, housing, workforce development), Environment & Conservation and Arts & Culture.
18% of the granted funds supported Environment & Conservation nonprofits. This included organizations like Orange County Coastkeeper, which runs the WHALES program – Watershed Heroes: Actions Linking Education to Stewardship. The program provides hands-on environmental education to underserved junior high and high school students in Orange County. Another recipient was TreePeople, which focuses on expanding the tree canopy in historically underserved communities across Greater Los Angeles and the Inland Empire. Their efforts involve strategic tree planting, community engagement, education, local hiring, and long-term maintenance using industry-approved arboriculture practices. Additional grants were awarded to stakeholder groups such as the Boys and Girls Clubs, the Food Bank of Southern California, and Project Scientist.
Ecolab continues our work as a founding member of the Water Resilience Coalition (WRC). Ecolab stepped forward as the Basin Champion for one of the WRC’s priority basins: California – containing our site’s catchment. As Basin Champion, Ecolab convened corporations, nonprofits, and governmental bodies to launch the California Water Resilience Initiative (CWRI). In line with California’s Water Supply Strategy, this initiative aims to shore up and advance efforts to close the projected water supply deficit in the state through public-private partnerships. Since its launch, Ecolab and other leaders of the initiative have begun building a roadmap of high-impact projects in need of corporate investment and engagement to reduce, reuse, and replenish water in the region. The CWRI aims to serve as a leading example of how corporations can help California reach its water goals. Through this important initiative, Ecolab is partnering across sectors to promote resiliency for communities, the economy, and ecosystems.
Ecolab supported the Esperanza Elementary School Project through the California Water Resilience Initiative (CWRI), with funding provided by the Ecolab Foundation. The project is a public-private partnership that strategically aligns community impact with volumetric water benefits for our business. The grant is to the Los Angeles Land Trust to support the Esperanza Elementary School Project in the Westlake neighborhood in Central L.A., a dense and disadvantaged area of the city. The project will convert 33,310 square feet of paved area into green space with native plants and trees, including bioswales. This will help reduce runoff, improving water quality benefits and reducing flood risk.
Multiple water replenishment projects that impact the Southwest United States were funded and executed across Ecolab. These replenishment projects, such as the Colorado River Indian Tribes (CRIT) System Conservation Project, allow Ecolab to collaborate with other stakeholders to reduce the impact and severity of water shortage declarations of our catchment's primary water sources.
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 on California. Ecolab continues 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.
On top of local water stewardship efforts, Ecolab’s global giving program, Solutions for Life, enhances the company’s mission to conserve and protect freshwater through partnerships and additional projects with The Nature Conservancy and the Project WET Foundation.
This case study was created to comply with AWS indicators 5.1.1, 5.2.1, 5.3.1. 5.4.1, 5.4.2, 5.5.1, 5.5.2 and 5.5.3. For more information, please contact sustainability@ecolab.com.
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