2021 East Otago lead poisoning scare

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In February 2021, the East Otago towns of Waikouaiti and Karitane in New Zealand reported high lead levels in their water supplies. Local and national authorities responded by dispatching water tanks and staff to assist local residents and offering them free blood tests, fruits and vegetables. The lead poisoning scare also attracted covered by national media. [1] [2] [3] By 10 March 2021, the Southern District Health Board confirmed that test results indicated that long term exposure to lead in the water supply posed minimial risk to the local population. [4]

History

In early February 2021, high levels of lead (40 times the acceptable level of 0.01 mg/L) were detected in the water supplies of the towns of Waikouaiti and Karitane, which lie within the boundaries of Dunedin. The high levels of lead were first detected on 18 December 2020 but the alert was emailed to a Dunedin City Council staff member who was on holiday. [1] [2] In response, Director-General of Health Ashley Bloomfield offered free blood tests to Karitane and Waikouaiti residents. The Dunedin City Council also dispatched water tanks and staff to assist and reassure local residents. [2] Prime Minister Jacinda Ardern also described the lead levels in the towns as "unacceptable". [5] On 9 February, the City Council distributed free fruits and vegetables to residents of Waikouaiti, Karitane, and Hawksbury due to concerns about eating crops irrigated with water believed to be contaminated. [3]

As a result of the lead scare, the City Council announced on 11 February that it would drain a raw water reservoir and replace 5 kilometers of old pipes in order to reassure residents of Waikouaiti, Karitane and Hawksbury. [6] By 10 March, the Southern District Health Board confirmed that 1,512 people had been tested, with blood test results indicating that nobody had a blood lead level requiring hospitalisation and that long term exposure to lead from the water supply was limited. [4]

On 28 July, the Dunedin City Council lifted the "do not drink water" notice in Waikouaiti, Karitane, and Hawksbury. However, the Ministry of Health recommended that people flush about 500 ml of water from the cold tap before using water for drinking, cooking or brushing teeth. Authorities have been unable to identify the source of the lead scare. [7] [8]

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References

  1. 1 2 "Water in two tiny NZ towns has toxic levels of lead. Locals weren't warned for a month because staffer was on holiday". The New Zealand Herald . 5 February 2021. Archived from the original on 5 February 2021. Retrieved 5 February 2021.
  2. 1 2 3 Elder, Vaughan (4 February 2021). "Lead in water found at 40 times acceptable level". Otago Daily Times . Archived from the original on 5 February 2021. Retrieved 5 February 2021.
  3. 1 2 "Dunedin City Council providing free fruit and veg as lead water scare continues". Radio New Zealand . 9 February 2021. Archived from the original on 7 February 2021. Retrieved 9 February 2021.
  4. 1 2 "Lead scare: Long-term health problems 'unlikely'". Otago Daily Times . 10 March 2021. Archived from the original on 12 March 2021. Retrieved 12 March 2021.
  5. ↑ Miller, Grant (5 February 2021). "'Unacceptable' – PM on lead levels in East Otago". Otago Daily Times . Archived from the original on 5 February 2021. Retrieved 5 February 2021.
  6. ↑ McNeilly, Hamish (11 February 2021). "Reservoir to be drained and 5km of pipes replaced as council tackles lead scare". Stuff . Archived from the original on 12 February 2021. Retrieved 25 February 2021.
  7. ↑ "No drinking water notice lifted in east Otago towns". 1News . 28 July 2021. Archived from the original on 27 July 2021. Retrieved 28 July 2021.
  8. ↑ Graham, Rachel (28 July 2021). "East Otago drinking water notice lifts, but source of lead spike remains mystery". Radio New Zealand . Archived from the original on 28 July 2021. Retrieved 28 July 2021.
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