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Quartiles
Quartiles are used to provide relative ranking of values for river water quality indicators on LAWA to determine current state. Sites in Quartile 1 (Q1) are in the best 25% of comparable sites, whereas sites that rank in the worst 25% of comparable sites are grouped into Quartile 4 (Q4). This is a...
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Factsheets
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Can I Swim Here?
Swim Smart Checklist
Water quality and conditions can change quickly. Recreating in contaminated water is a risk to human and animal health. To help keep you, your family, and dogs well this summer follow the Swim Smart Checklist below.
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Factsheets
Water clarity
What is water clarity? Water clarity refers to the ability of light to travel through water and has two important aspects: light penetration and visual clarity.
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Factsheets
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Can I Swim Here?
What do the swim icons mean?
LAWA provides New Zealand's most comprehensive recreational water quality information to help you decide where and when to swim. The swim icons on LAWA show how water quality results compare to national guidelines.
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News And Stories
Mangapapa Stream shines at River Awards
The Mangapapa Stream near Woodville in the Horizons Region has been recognised as the second most improved waterway for dissolved inorganic nitrogen at this year’s New Zealand River Awards.
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News And Stories
'Perfect timing' as Waitara Rivers gets thorough check-up
The Waitara River is set to gain extra benefits from a national pilot study focused on the best ways to assess any microbiological health risks to freshwater swimmers.
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News And Stories
‘Can I swim here?’ launched today includes Marlborough sites
A new ‘Can I swim here?’ online tool launched today means Marlborough residents and visitors can enjoy our rivers and beaches with confidence this summer. The online tool shows the most up-to-date water quality information for local sites across our region and is freely available on LAWA.org.nz/swim...
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News And Stories
“Call to action” on Southland’s environment
Environment Southland welcomes the Environment Aotearoa 2019 report released by the Ministry for the Environment and Stats NZ today as an opportunity to keep the need for improving the environment at the forefront of people's minds.
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News And Stories
“Know Before You Go” – Check summer swimming water quality online
As families prepare for days spent at rivers, lakes, and beaches this summer, LAWA (Land, Air, Water Aotearoa) project scientists are reminding New Zealanders to ‘know before you go’ and check water quality before swimming.
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News And Stories
$2M-plus govt boost to north freshwater improvement welcomed
News the government is to make a $2 million contribution to $4M of work to improve freshwater quality in the Northern Wairoa River and more than two dozen Northland dune lakes has been welcomed by the Northland Regional Council.
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News And Stories
$524k boost for Whangārei urban waterways
A welcome boost for the future of freshwater quality is how Northland Regional Council describes the newly-announced $524,000 of government funding for Whangārei urban waterways.
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News And Stories
2016 New Zealand River Awards
The Puhinui Stream in Mangere has won this year’s Supreme Award for New Zealand’s Most Improved River.
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