A law change to limit how long companies can discharge pollution into New Zealand's waterways has been shot down by a parliamentary select committee.
Green Party MP Catherine Delahunty's member's bill was influenced by the Tasman Pulp and Paper Mill's effluent discharges into the Tarawera River in the Bay of Plenty.
It became known as the Black Drain because the pollution gradually turned the waterway near-opaque.
The mill has been discharging into the Tarawera since 1955 and in 2009 gained a 25-year consent to continue the practice.