Ecolab Lerma Mexico Plant Employees

Ecolab Lerma, Mexico Plant Certified as Water Stewardship Leader

Alliance for Water Stewardship (AWS) Standard Case Study
Published November 2021 | Updated January 16, 2024


Ecolab’s manufacturing facility located in Lerma, Mexico, near Mexico City, Mexico, is a blend plant that primarily produces water treatment solutions and products. The Lerma facility sources water from the Valle de Toluca Aquifer. Wastewater is treated by a third-party wastewater treatment facility and ultimately discharged to the Lerma River.

In alignment with Ecolab’s commitment to a holistic approach to water management across its manufacturing facilities, in 2022, the company achieved the Core Certification for Alliance for Water Stewardship (AWS) International Water Standard at its Lerma plant. 


The team at Ecolab’s Lerma plant assessed the facility for opportunities to decrease water use across operations to meet Ecolab’s 2030 Impact Goals to reduce water impact by 40% per unit production across the enterprise and further restore greater than 50% of absolute water withdrawal volume at high-risk sites. Aligned with these enterprise goals, the local team’s objective was to reduce annual water use per ton of product by 3% on average each year from 2018 to 2030.

Water reduction opportunities were identified in the following areas: rainwater collection, restroom upgrades, condensate recovery and reverse osmosis- project to improve water circularity. Prioritization of these opportunities involved collaboration across the Corporate Sustainability and Lerma Engineering and Safety, Health and Environment teams.

A comprehensive risk assessment was performed leveraging insights from Ecolab’s Smart Water Navigator to identify shared and site-level water challenges. Implementation of water withdrawal reduction projects was prioritized based on risk probability and impact to site-level and community stakeholders. Of the five water outcomes of the AWS Standard, Lerma focused on sustainable water balance and good water quality status balancing relevancy and risk to the site.

Annual Savings

  • Water eROI icon


    gallons of water reduced

  • Total Value Delivered:

    USD Risk-adjusted cost savings 

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

Total annual water reduction of 858,000 gallons (3,250 cubic meters) equivalent to $12,800 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:

  • Implementation of a rainwater collection system for use in the emergency sprinkler system
  • Installation of high-efficiency bathroom fixtures
  • Installation of a condensate recovery system
  • Optimization of process equipment washout processes
  • Improvement in deionized water system efficiency
  • Enhanced automation of the boiler system

The following projects are considered for future enhancements:

  • Continued optimization of boiler operations
  • Expansion of rainwater collection system
  • Wastewater circularity project
  • Expansion of the condensate recovery optimization
  • Expansion of the condensate recovery process into additional areas of the facility
  • Cooling tower monitoring and optimization 

These combined efforts contribute to the Lerma plant’s progress towards their 3% water intensity reduction goal year over year.

Ecolab’s Lerma, Mexico Plant Map


Positive Water Impact | Total annual water reduction of 858,000 gallons (3,250 cubic meters) equivalent to 24% reduction of water use per ton of product realized from a 2018 baseline

Economic Results | $12,800 USD in risk adjusted cost savings

Water intensity and water withdrawal progress from 2018-2022 at Lerma plant. 35% reduction of withdrawal and 24% reduction of water intensity from 2018 baseline, achieving better than 2022 target.

Water Governance

At the plant level, the maintenance supervisor is responsible for wastewater testing, water consumption control and water-related projects. The site’s safety, health and environment manager is responsible for water compliance and the quality department is responsible for incoming water quality.

To maintain good water quality of incoming water, internal daily water testing is carried out in addition to third-party wastewater testing every year. Wastewater is tested by the third-party treatment facility and reported monthly. 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 has not had any water-related violations in the past year.

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 Safety, Health and Environment (SHE) position are publicly available and serve as commitments to and guidance on water-related issues and compliance. Ecolab’s Water Stewardship Position formalizes 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.

Water Stewardship Journey

In addition to internal operational improvements, Ecolab’s Lerma facility’s external water stewardship activities are ongoing. Shared challenges between the plant and relevant local stakeholders include water scarcity and water quality. To address these shared issues, Ecolab collaborates with other water users in the basin and shares its AWS certification journey with stakeholders in the local watershed. Ecolab is collaborating with H2O Lerma, a community project to improve the water quality of the Lerma River. Through this project, the site collects eggshells that are used to create water filters. And, to contribute to the health of important water-related areas, 100 volunteers from Ecolab’s Lerma and Cuautitlán Izcalli, Mexico, sites partnered with The Nature Conservancy (TNC) and ProNatura to plant 2,000 trees in the community of San Andres Totoltepec in Mexico City in 2019.

In 2022 more than 90 volunteers for the Cuautitlan and Lerma plants helped build mobile cisterns for low-income families in the community of Piedra Grande, Huixquilucan, Estado de Mexico. These cisterns will allow them to store and filter water that can be sued for human consumption, animals or food production. From their volunteer work 20 families and more than 200 people will benefit from this work.

On top of local water stewardship efforts, Ecolab’s global giving program, Solutions for Life, enhances the company’s mission to conserve and protect fresh water through partnership with two global non-governmental organizations: TNC and 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

Additional Water Stewardship Stories

This is a carousel. Use Next and Previous buttons to navigate, or jump to a slide with the slide dots.

No related success stories were found.