What is the company's investment in sustainable manufacturing technology in 2021
investments in areas with strong growth opportunities such as personal safety, home improvement and healthcare with continued emphasis on our priority growth platforms. The rapid movement to an even more digital-first world also opens additional opportunities for 3M. We are pioneering innovations that improve performance of data centers and semiconductor manufacturing, which will be more relevant moving forward. We will also do more to leverage e-commerce, along with digital technologies to better serve our customers.
Ultimately, we have big opportunities to unleash 3M Science and drive sustainable long-term growth, and we will ensure that our teams have the resources to capitalize. We continue to advance the digitization of 3M while also accelerating our use of data and analytics in everything we do. Further strengthening our supply chain is a priority in 2021 with a focus on highly sustainable, disruptive and safe manufacturing technology, which will help us deliver on our promises to customers and shareholders. To that end, I want to close by talking about the commitments we will keep in 2021 and beyond: Leading our industry in science, society and sustainability.
3M Science drives our business forward. We leverage and combine our technologies in unique ways across the company, creating new products and new lines of business, and we are positioned to do even more to deliver differentiated value for our customers into the future. In a similar way, 3M is partnering with our communities to improve society. In 2020, we took steps to advance our core values, including diversity, equity and inclusion.
And in the coming year, we will hold ourselves accountable to new goals to support underrepresented groups at 3M, building on our recent progress. We will also be releasing a new global diversity, equity and inclusion report with details on our metrics. We remain committed to sustainability, which includes using science to proactively manage PFAS and to enable success in our ongoing work with communities and governments to advance our environmental stewardship. We will continue to increase investments to make our factories more sustainable, including $100 million in investments this year, which is included in our 2021 capex guidance, to further reduce water usage and improve water quality around our manufacturing sites.
To help address questions you have been asking, I would also like to touch on our strong history of working with governments and leveraging science to solve big challenges around the world. We have had productive conversations with President Biden's transition team and now the administration about their COVID-19 response, and we have open lines of communication. We will continue to do all we can to get respirators and other personal protective equipment to frontline workers and help America and the world beat the pandemic. On environmental stewardship, we share a common goal with governments of improving water quality and doing so in a way that is based on sound science, established regulatory processes and collaboration with a broad range of stakeholders.
We look forward to working with President Biden's administration and congressional leaders to pursue these shared goals, including through the remediation of PFAS, where appropriate. And we aim to build on the successful public-private partnerships that 3M has led globally throughout our history as a company. To wrap up, we are confident about what's ahead in 2021 and in our ability to create more value from the 3M model and build an even more competitive and sustainable enterprise. I will now turn the call over to Monish to cover the details of our guidance.
Monish?
Monish Patolawala -- Chief Financial Officer
Thanks, Mike. Please turn to Slide 13. As Mike mentioned, we are initiating full-year 2021 guidance as end-market visibility has continued to improve despite ongoing macroeconomic uncertainty. As a result, we will no longer be reporting monthly sales updates as we had in 2020.
Looking at sales. We are forecasting total sales growth of 5 to 8%, with org
investments in areas with strong growth opportunities such as personal safety, home improvement and healthcare with continued emphasis on our priority growth platforms. The rapid movement to an even more digital-first world also opens additional opportunities for 3M. We are pioneering innovations that improve performance of data centers and semiconductor manufacturing, which will be more relevant moving forward. We will also do more to leverage e-commerce, along with digital technologies to better serve our customers.
Ultimately, we have big opportunities to unleash 3M Science and drive sustainable long-term growth, and we will ensure that our teams have the resources to capitalize. We continue to advance the digitization of 3M while also accelerating our use of data and analytics in everything we do. Further strengthening our supply chain is a priority in 2021 with a focus on highly sustainable, disruptive and safe manufacturing technology, which will help us deliver on our promises to customers and shareholders. To that end, I want to close by talking about the commitments we will keep in 2021 and beyond: Leading our industry in science, society and sustainability.
3M Science drives our business forward. We leverage and combine our technologies in unique ways across the company, creating new products and new lines of business, and we are positioned to do even more to deliver differentiated value for our customers into the future. In a similar way, 3M is partnering with our communities to improve society. In 2020, we took steps to advance our core values, including diversity, equity and inclusion.
And in the coming year, we will hold ourselves accountable to new goals to support underrepresented groups at 3M, building on our recent progress. We will also be releasing a new global diversity, equity and inclusion report with details on our metrics. We remain committed to sustainability, which includes using science to proactively manage PFAS and to enable success in our ongoing work with communities and governments to advance our environmental stewardship. We will continue to increase investments to make our factories more sustainable, including $100 million in investments this year, which is included in our 2021 capex guidance, to further reduce water usage and improve water quality around our manufacturing sites.
 To help address questions you have been asking, I would also like to touch on our strong history of working with governments and leveraging science to solve big challenges around the world. We have had productive conversations with President Biden's transition team and now the administration about their COVID-19 response, and we have open lines of communication. We will continue to do all we can to get respirators and other personal protective equipment to frontline workers and help America and the world beat the pandemic. On environmental stewardship, we share a common goal with governments of improving water quality and doing so in a way that is based on sound science, established regulatory processes and collaboration with a broad range of stakeholders.
We look forward to working with President Biden's administration and congressional leaders to pursue these shared goals, including through the remediation of PFAS, where appropriate. And we aim to build on the successful public-private partnerships that 3M has led globally throughout our history as a company. To wrap up, we are confident about what's ahead in 2021 and in our ability to create more value from the 3M model and build an even more competitive and sustainable enterprise. I will now turn the call over to Monish to cover the details of our guidance.
Monish?
Monish Patolawala -- Chief Financial Officer
Thanks, Mike. Please turn to Slide 13. As Mike mentioned, we are initiating full-year 2021 guidance as end-market visibility has continued to improve despite ongoing macroeconomic uncertainty. As a result, we will no longer be reporting monthly sales updates as we had in 2020.
Looking at sales. We are forecasting total sales growth of 5 to 8%, with org