Local Wastewater

This shows weekly recent changes in covid levels in individual wastewater catchments.

Most recent week is 2025-06-08

Date in this table comes from COVID-19 Data Repository by the Institute of Environmental Science and Research at https://github.com/ESR-NZ/covid_in_wastewater

The place is the area covered by the wastewater catchment region.

The number for the week is the local reading for that week as a percentage of the average readings for the six months prior to the week in question for that wastewater catchment. So 100% would mean the week in question is exactly the same as the average of the last 6 months (generally a low amount since there have been no waves).

The background colours are: black means the week is in the lowest quarter of readings for the previous 6 months, purple is in the middle half of readings for the previous 6 months, fuchsia red is in the highest 25% of readings for the previous 6 months, and orange gold is above any readings in the last 6 months.

Small areas need to be aware that if a major event is bringing in lots of people at once, that can change the amount of covid (because there are more people) rather than the rate of infection among people. It takes local knowledge to know if such things are going on, so I leave that to the reader to judge.

The “Weeks tested in the last 6 months” column is the number of weeks prior to the most recent reading for which there are tests. Less tested areas can expect more variability.

SampleLocation 12 May to 18 May 19 May to 25 May 26 May to 01 Jun 02 Jun to 08 Jun Weeks tested in last 6 months
AU_Central 145.3% 478.4% 157.8% 135.5% 15
AU_Eastern 161% 403.3% 190.3% 252.5% 26
AU_Mangere 140.9% 262.2% 159.5% 311.9% 27
AU_Rosedale 185.6% 315.1% 142.1% 188.5% 22
AU_SouthWestern 388.9% 412.4% 106.2% 184.8% 27
BP_Rotorua 206.3% 441.7% 300.4% 267.2% 25
CA_Christchurch 156.1% 258.2% 201% 339% 27
OT_DunedinTahuna 444.7% 955.7% 936.7% 363.2% 27
OT_Queenstown 319.5% 394.1% 189.9% 173.7% 27
WG_MoaPoint 138.8% 92% 217.3% 190.7% 27
WG_Porirua 112.3% 47.4% 101% 163.2% 27
WG_Seaview 161.4% 53.9% 174.3% 127.5% 27
Lowest 25%
Midrange
Upper 25%
Above last 6 months