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Wigmore Stream Water Quality

TCDC has agreed to provide Hahei Residents and Ratepayers Association with water quality test results from the Wigmore Estuary on a  regular basis.

Here is a copy of the agreement, HRRA TCDC Water Testing MOU

Samples are taken monthly except over the busy holiday season when they are taken weekly.

They are taken from the estuary of the Wigmore Stream as shown here.

As agreed in the above Agreement, samples are taken as described in the Wastewater Treatment Plant Resource Consent. This states that “samples to be collected within the period 1 hour either side of local low tide during daylight hours.”

You can download the Wastewater Treatment Plant Resource Consent here. Hahei WWTP Consent renew2030

Sampling Location

Hahei Beach Wigmore Stream Sample Point

Clearing Wigmore Stream Blockage

It is the responsibility of TCDC and Veolia (who is the TCDC Water/Wastewater contractor), to open up the Wigmore Stream when required.

If you see the stream is blocked, ANYONE can file a Request for Service with TCDC by either:

It will be actioned by an earthmoving contractor, such as Donovan’s after Thames-Coromandel District Council/Veolia authorizes them.

Donovan’s, or any other earthmoving contractor, cannot be engaged to clear the stream by members of the community or community groups.

A summary of the results of these tests is shown below.

Date E. Coli Enterococci Ammoniacal Nitrogen (as N) mg/l Weather Prior to Sample/Comments
2024/02/13 62 16 0.0074 Some rain 42mm, 14/15 Jan. Village very busy.
2024/01/16 180 110 <0.025 Some rain 42mm, 14/15 Jan. Village very busy.
2024/01/16 180 110 <0.025 Some rain 42mm, 14/15 Jan. Village very busy.
2024/01/02 90 48 0.44 Heavy rain 42mm, 28/29 Dec. Village very busy. Stream recovered very quickly
2023/12/29 18,000 11,000 0.71 Heavy rain 24&25 Dev and 27 to 31 Dec. Village very busy. Stream dangerous for swimming. Most probably caused by blocked outlet to ocean
2023/12/19 760 370 0.015 No rain since 12 Dec. Village getting busy
2023/12/13 120 74 1.1 16mm rain 10 Dec Village getting busier
2023/11/01 250 520 0.14 8mm rain 31 Oct to 1 Nov. Village very quiet.
2023/10/16 36 7 0.033 Little rain prior to 16 Oct. Village very quiet.
2023/09/19 <1.6 11 0.026 LIght rain 2 Sept to 21 Sept. Village very quiet.
2023/08/18 450 100 <0.4 LIght rain 8 Aug to 21 Aug Village very quiet.
2023/07/18 320 220 <0.4 Last rain 7 July. 7 days fine weather, Village very quiet.
2023/06/18 17,000 5,000 <0.4 Heavy Rain 16- 18 June.
2023/05/09 1,200 3,200 0.025 Heavy rain 60mm, 9 May, Village very quiet.
2023/04/11 690 960 0.032 Heavy rain 10 April, Village very quiet.
2023/03/06 2,100 36,000 0.022 Very heavy rain (<150mm)5 & 6 March, Stream flooding Village very quiet
2023/02/07 270 120 0.012 Heavy rain 1 Feb, showers 6 Feb. Village quiet
2023/02/02 ?? ?? 0.035 Sample lid was not on correctly and the entire sample leaked so E.Coli and Enterococci testing was not possible.
2023/01/25 610 970 0.16 LIght Showers. Stream flowing more normally. Village very busy
2023/01/18 2,800 2,800 0.096 LIght Showers. Stream flowing more normally. Village very busy
2023/01/13 330 220 0.028 Last heavy rain Jan 11. Stream flowing more normally
2023/01/07 690 1,200 0.044 100+mmrain Jan 1-7. Stream flooded
2022/12/26 630 270 0.026 20mm rain Dec 26526. Stream flowing normally.
2022/12/22 230 150 0.022 light rain Dec 22. Stream flowing normally
2022/11/14 870 56 0.032 50mm rain Nov 9/10. Stream flooded.
2022/10/13 81 74 0.023 No rain since 7 Oct. Stream clear. Village empty
2022/09/27 200 72 0.06 No rain since 22 Sept. Stream clear. Village empty
2022/08/02 39 33 0.029 No rain since 31 July. Stream clear. Village empty
2022/07/07 6,300 5,700 0.041 Heave rain 5-6 July. Stream brown. Village empty
2022/06/22 550 220 0.039 Showers from Feb 10. Stream not clear. Village empty
2022/05/04 1,200 1,100 0.29 Dry weather. Stream clear. Village quiet
2022/04/05 23 15 <0.005 Dry weather. Stream clear. Village quieter
2022/03/02 42 <1.6 0.04 Dry weather. Stream clear. Village quieter
2022/02/14 1,200 470 0.094 40 mm rain on 6 Feb. Heavy rain run off has polluted Wigmore. Village quieter
2022/03/08 5,300 11,000 0.048 40 mm rain on 6 Feb. Heavy rain run off has polluted Wigmore. Village quieter
2022/02/03 350 82 <0.005 Showers from Feb 1. Stream not clear. Village busy
2022/01/26 32,000 75,000 0.062 30mm rain on Jan 26. Heavy rain run off has polluted Wigmore. Village full
2022/01/20 66 60 0.021 2mm rain on Jan 15/16. Otherwise hot and dry Village full
2022/01/13 220 40 0.29 2mm rain on Jan 07. Otherwise hot and dry Village full
2021/12/29 480 1,100 0.5 4mm rain on 28/29 Dec prior to test. Village full
2021/12/21 39 74 <.0.005 Last rain on Dec 16 5 days prior to test. Village filling up for Xmas break
2021/11/02 220 54 0.043 No Rain for week prior to test. Village empty
2021/10/05 460 72 0.035 Rain (20mm) on morning of Oct 4. Clear Oct 5. Village empty
2021/09/15 11,000 6,500 0.046 Taken during heay rain. Wigmore flooding.
2021/08/17 1,100 82 0.034 TIme Not Recorded. Apporx 10mm rain in previous 7 days. Wigmore flowing clear. Village quiet
2021/07/06 120 82 0.077 08:45. No rain in previous 7 days. Wigmore flowing clear. Village quiet
2021/06/15 2,100 2,600 0.067 15 mm rain 15 June. Wigmore flowing with discoloured water. Village quiet
2021/05/17 550 670 0.012 30mm rain 15 May. Wigmore flowing with discoloured water. Village quiet
2021/05/04 1,200 1,100 0.29 No rain since April 22. Village quiet but was busy over Easter and school holidays
2021/04/22 740 730 0.059 30mm rain 21 April. School holidays so more people in village
2021/04/05 23 15 <0.005 No rain since March23. Village quiet
2021/03/23 180 320 0.019 15mm rain 18 March. Very Quiet in Village
2021/03/02 42 <1.6 0.04 No rain since Feb 15. Village emptied out after holidays
2021/02/19 210 360 0.077 70mm rain 15 Feb. Quiet in Village
2021/02/14 1,200 470 0.094 Approxx 10mm rain on Feb 11-12. Village emptying out after holidays
2021/02/08 5,300 11,000 0.062 Approxx 60mm rain on Feb 7/8. Village full. Good example of how heavy rain effects water quality
2021/02/03 350 82 <0.005 No rain. Village full.
2021/01/26 32,000 75,000 0.048 Approxx 30mm rain on Jan 25/26. Village full. Good example of how heavy rain effects water quality
2021/01/25 120 120 0.051 No rain. Busy holiday season
2021/01/20 28 21 0.028 No rain. Busy holiday season
2021/01/20 90 96 0.041 6mm rain morning 20 Jan. Busy holiday season
2021/01/14 240 330 0.25 No rain. Busy holiday season
2021/01/06 510 350 1.1 40mm Rain 3 Jan, then dry hot weather. Busy holiday season
2020/12/31 25 2 0.151 No Rain. Last rain on 24 Dec. Busy
2020/12/22 98 110 0.037 LIght rain (8mm) on sample day
2020/12/16 25 21 0.31 No rain, last rain (20mm) on 10 Dec
2020/10/05 11 5 0.044 No rain
2020/09/07 1,800 3,000 0.1 Raining day of sample
2020/08/28 460 30 0.2 Heavy Rain (43mm) on 23 Aug
2020/07/15 240 130 0.1 Light Rain on 6 July. No more prior to sample
2020/06/17 390 540 0.1 Light Rain on 17 June. No more prior to sample
2020/05/28 1,400 480 <0.4 Heavy Rain (43mm) on 23 Aug
2020/04/01 330 350 0.1
2020/03/12 64 8 0
2020/02/11 44 7 0
2020/02/03 <1.6 <1.6 0.1
2020/01/28 28 15 0
2020/01/22 63 31 0.1
2020/01/11 18 2 0.5
2020/01/03 18 72 0
2019/12/23 78 200 0
2019/12/19 290 570 0
2019/12/05 580 520 0.4
2019/11/13 <1.6 25 0.2
2019/10/16 2,000 200 0.1
2019/09/11 770 260 0.1
2019/08/19 42 33 0
2019/07/08 94 220 0
2019/06/12 220 350 0.1
2019/06/07 18 52 <0.005
2019/04/11 620 2,700 1.1
2019/04/04 68 200 <0.4
2019/02/28 350 150 0
2019/02/20 25 16 0
2019/02/14 270 94 0
2019/02/07 25 5 0
2019/02/03 68 200 <0.4
2019/01/30 140 72 0
2019/01/22 92 10 <0.4
2019/01/14 2,600 340 <0.4
2019/01/08 2 7 <0.4
2019/01/02 230 300 1
2018/12/27 210 180 <0.4
2018/12/19 1,300 510 0
2018/11/15 150 170 <0.4
2018/10/17 94 260 <0.4
2018/09/19 13,000 2,300 <0.4
2018/08/22 450 100 <0.4
2018/07/18 320 220 <0.4
2018/06/18 17,000 5,000 <0.4 Significant rain over 2 weeks prior to sample. Raining on day sample taken
2018/02/11 1,700 2,200 Heavy Rain (37mm) 8-12 Feb 2018
2018/02/02 2,300 530 Rain (14 mm) 2 Jan 2018
2018/01/26 650 840 Light rain (14mm) 18 Jan 2018
2018/01/17 40 11 No rain in previous week
2018/01/10 600 410 Heavy Rain (40mm) 4 Jan 2018
2017/12/22 23 46

All levels are reported as cfu/100 ml

To set these results in perspective, the Ministry of Environment provides guidelines for Recreational Fresh Water. These guidelines state that the maximum levels for E Coli   is 550 cfu/100ml and Entrococci is 280 cfu/100ml. As you can see, the water quality in the Wigmore frequently exceeds the maximum level. High levels normally occur during and after rainfall when stormwater washes organic material into the stream.

Our recommendation is to avoid swimming in the Wigmore Stream, particularly when it is raining and for a day or so afterwards

For detailed information on guidelines for recreational water quality in Seawater and Fresh Water, see NZ Ministry of Environment Guidelines here. Microbiological Quality Jun03. Go to table E2 in this publication.

Here is a summary of the recommendations.

Lab Test Results can be viewed by clicking here.

Waikato Regional Council Coastal Recreational Water Quality Monitoring Programme.

Waikato Regional Council (WRC) monitors beaches in the Coromandel. Click here to see the latest information. 

When reviewing WRC data however, note that only seawater from beaches is sampled. We think it is important to also monitor streams that flow into the ocean as many children like to play in the stream estuaries.