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Eff guide ENVIRONMENTAL GUIDELINES USE OF EFFLUENT BY IRRIGATION C CENVIRONMENTAL GUIDELINES USE OF EFFLUENT BY IRRIGATION CFrom September the Department of Environment and Conservation DEC incorporates the Environment Protection Authority EPA which is es

ENVIRONMENTAL GUIDELINES USE OF EFFLUENT BY IRRIGATION C CENVIRONMENTAL GUIDELINES USE OF EFFLUENT BY IRRIGATION CFrom September the Department of Environment and Conservation DEC incorporates the Environment Protection Authority EPA which is established in the Protection of the Environment Administration Act as the Authority responsible for administering the Protection of the Environment Operations Act POEO Act Statutory functions and powers in the POEO Act continue to be exercised in the name of the EPA Published by Department of Environment and Conservation NSW ?? Goulburn Street Sydney PO Box A Sydney South Phone switchboard Phone information publications requests TTY Fax Email info environment nsw gov au Website www environment nsw gov au The Department of Environment and Conservation NSW is pleased to allow this material to be reproduced in whole or in part provided the meaning is unchanged and its source publisher and authorship are acknowledged ISBN October DEC Printed on recycled paper CForeword Water recycling is becoming a critical element for managing our water resources By safely irrigating recycled water sustainable development can be achieved while conserving our high quality water supplies Being able to access alternative safe water sources is particularly critical in times of drought By providing an additional source of water recycling can help to decrease the diversion of water from sensitive river and wetland ecosystems Another major bene ?t of e uent reuse by irrigation is the decrease in wastewater discharges to natural waterways When pollutant discharges to waterways are removed or reduced the pollutant loadings to these waters are decreased Substances that can be pollutants when discharged to waterways can be bene ?cially reused for irrigation For example plant nutrients such as nitrogen and phosphorus can stimulate harmful algal blooms in waterways but are a valuable fertiliser for crops In some cases returning well treated water to rivers might provide a better outcome than reuse by irrigation for example to supplement river ows This Guideline will however help increase the options available for water management particularly those sources of wastewater that are not suitable or adequately treated for safe discharge to our rivers estuaries and oceans Many water needs can be satis ?ed with recycled water as long as it is adequately treated to ensure water quality is appropriate for the proposed use Greater treatment and management is required for uses where there is a greater chance of human exposure to the recycled water E uent can pose environmental public health or agricultural resource risks if not managed appropriately and the information in this Guideline will support the establishment of safe e uent irrigation reuse schemes Water recycling has proven to be e ?ective and successful in creating a new and reliable water supply while not compromising public health E uent reuse by irrigation is now an accepted practice that will play a greater role in our overall water supply in the future The NSW Government is committed to encouraging and optimising the safe reuse of water This Guideline will provide an essential information resource