The New Zealand Institute for Public Health and Forensic Science (PHF Science) was formerly named The Institute of Environmental Science and Research (ESR).

Wastewater Surveillance Report - Monthly Report April 2024

Please note: As of 1 July 2025, the New Zealand Institute for Public Health and Forensic Science (PHF Science) is the new name for the Institute of Environmental Science and Research (ESR). Research and reports published prior to this date may reference the organisation’s former name.

Summary

In April 2024, 264 samples were collected across Aotearoa. SARS-CoV-2 RNA was detected in 262/264 (99%) of samples from 44/44 sites (100%). Following a brief upward trend in early 2024, the latest data shows a slight to moderate decline in SARS-CoV-2 RNA in wastewater nationally in April 2024.

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