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Countries are legally obliged to treat sewage before it is released into waterways.
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Sea level rise means land next to Lake Waihora will not be able to treat sewage in the future.
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Amalgamation created a council-owned company called Watercare to deliver water and treat sewage and wastewater, leaving drainage within the council.
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City authorities asked residents to reduce use of toilets and faucets because power outages left waste water plants unable to treat sewage.
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Nine possible sites across Fingal have been earmarked for a plant to treat sewage from across Dublin and parts of Kildare and Meath.
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Treated sewage might not be as safe as the cruise lines claim.
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It means partially treated sewage is frequently discharged into Dublin Bay.
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What is causing partially- treated sewage from Dublin region to leak into Dublin Bay?
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In what is called the septic system of treating sewage.
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Instead, it uses treated sewage water to cool steam.
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By law, ships can dump treated sewage anywhere.
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That is, from the treated sewage.
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Instead, treated sewage sludge that still contains some heavy metals is given free to some farmers to use sparingly.
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The agency also notes that there are 28 large towns and cities discharging inadequately treated sewage into the environment.
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Meanwhile, the Christchurch City Council is moving to reduce the amount of treated sewage being pumped into a local river.
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The delay will mean partially treated sewage will continue to be discharged into the Tasman Sea via the South Beach outfall.