I saw this call for proposals mentioned on Twitter. I don't know anything else about it than what it says on their website.
See here:
www.elsevier.com/connect/st_refDomain=t....refQuery=/RJ9opVMyxx

Or here:
www.relx.com/corporateresponsibility/env...enge/Pages/Home.aspx

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The 2016 competition launched on 1 March


The RELX Group Environmental Challenge is awarded to projects that best demonstrate how they can provide sustainable access to safe water where it is presently at risk and/or access to improved sanitation. Projects must have clear practical applicability, address identified need, and advance related issues such as health, education, or human rights.

There is a $50,000 prize for the first place entry and a $25,000 prize for the second place entry. The winners will receive free access for one year to ScienceDirect, Elsevier’s database of full text, scientific information, including almost 250,000 articles since 2000 in Environmental Sciences. The winning projects will be highlighted in the RELX Group journal Water Research.

RELX Group is a global provider of world-class information and tools that help our customers advance science, improve medical outcomes, enable better legal decisions, evaluate risk, forge business relationships and gain business insight. All four business units of our company have a growing portfolio of products and services that advance environmental knowledge and understanding. We are committed to using our extensive networks and expertise to facilitate the exchange and dissemination of useful information about improving access to sustainable water supply.

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Use the tabs on the left of their website to find out more, e.g.:

www.relx.com/corporateresponsibility/env...t-the-challenge.aspx

The RELX Group Environmental Challenge is open to individuals or organisations operating in the not-for-profit and for-profit sectors. Projects must advance sustainable access to safe water where it is presently at risk and/or access to improved sanitation, and include the following criteria:

• Be replicable, scalable and sustainable. and set a benchmark for innovation
• Have practical applicability
• Address non-discrimination/equity of access
• Involve and impact a range of stakeholders
• Have local/community-level engagement

These are the criteria against which projects will be assessed. Early stage projects are preferred. The winning project in the RELX Group Environmental Challenge will receive a single payment of $50,000, with the second place finisher receiving a single payment of $25,000.

Application details are here (deadline is 2 May 2016):
www.relx.com/corporateresponsibility/env...nge/Pages/apply.aspx

Good luck!