Potential Of Drinking Water Alliances To Address Nitrate Pollution Experiences From Germany

This paper provides background to the State of the World’s Land and Water Resources for Food and Agriculture Report, Edition 2021 (SOLAW 21) with an innovative governance approach to addressing non-point pollution sources originating from agricultural activities: alliances between water utilities and farmers in designated water protection areas and drinking water extraction areas. The alliances revolve around the idea of balancing diverging targets such as maintaining drinking water standards and the viability and profitability of agricultural businesses. While farmers can achieve high food production levels by using mineral and organic fertilizers and pesticides, these may have enormous side effects: nitrate and phosphate are transferred into surface and groundwater, impairing water quality and aquatic life. It may also result in the water no longer being usable as drinking water without special, costly treatment. These negative effects led to the establishment of voluntary alliances between water utilities and farmers (hereafter called ‘drinking water alliances’ or ‘alliances’) in the 1980s when the German government strengthened the threshold values for nitrate in drinking water from 90 mg/l to 50 mg/l. Water utilities, together with the regional (Laender) governments, initiated alliances with farmers to adopt fertilization and land management practices in order to protect drinking water resources from nitrate pollution.

This book offers a broad and global level description of the current status of wastewater use in agriculture and then brings the readers to various places in the MENA Region and Europe to explain how some countries and regions have addressed the challenges during implementation. On a global scale, over 20 million hectares of agricultural land are irrigated using wastewater. This is one good, and perhaps the most prominent, example of the safe use potential of wastewater. Water scarcity and the cost of energy and fertilisers are among the main factors driving millions of farmers and other entrepreneurs to make use of wastewater. In order to address the technical, institutional, and policy challenges of safe water reuse, developing countries and countries in transition need clear institutional arrangements and more skilled human resources, with a sound understanding of the opportunities and potential risks of wastewater use. Stakeholders in wastewater irrigation who need to implement from scratch or improve current conditions, find it difficult to gather the necessary information on practical implementation aspects. The main objective of this book is to bridge that gap.

The United Nations World Water Assessment Programme (WWAP) is hosted and led by UNESCO. WWAP brings together the work of 31 UN-Water Members and 38 Partners to publish The United Nations World Water Development Report, (WWDR) series. The annual World Water Development Reports focus on strategic water issues. UN-Water Members and Partners, all experts in their respective fields, contribute the latest findings on a specific theme. The 2017 edition of the World Water Development Report focuses on 'Wastewater' and seeks to inform decision-makers, inside and outside the water community, about the importance of managing wastewater as an undervalued and sustainable source of water, energy, nutrients and other recoverable by-products, rather than something to be disposed of or a nuisance to be ignored. The report's title - Wastewater: The Untapped Resource - reflects the critical role that wastewater is poised to play in the context of a circular economy, whereby economic development is balanced with the protection of natural resources and environmental sustainability, and where a cleaner and more sustainable economy has a positive effect on the water quality. Improved wastewater management is not only critical to achieving the Sustainable Development Goal on clean water and sanitation (SDG 6), but also to other goals of the 2030 Agenda for Sustainable Development.

This document is intended to provide an overview of the major components of surface and ground water quality and how these relate to ecosystem and human health. Local, regional and global assessments of water quality monitoring data are used to illustrate key features of aquatic environments, and to demonstrate how human activities on the landscape can influence water quality in both positive and negative ways. Clear and concise background knowledge on water quality can serve to support other water assessments.

Access to water and sanitation is internationally recognized human right. Yet more than t wo billion people lack even the most basic of services. The latest United Nations World Water Development Report, Leaving No One Behind, explores the symptoms of exclusion and investigates ways to overcome inequalities.

"This manual contains overview information on treatment technologies, installation practices, and past performance."--Introduction.