 |
Liffey Stream Test Results
Date: Sunday 14th Sep 2014
Weather: Sunny with a strong NE breeze. 13oC
| Test |
Excellent |
Satisfactory |
Unsatisfactory |
 |
Results |
Quality |
| pH |
7.8 |
6.5 - 8.9 |
Less than 6.5 or more than 9 |
7.40 |
Satisfactory |
| Conductivity (µS/cm) |
Less than 100 |
100 - 500 |
More than 500 |
270 |
Satisfactory |
| Dissolved Oxygen (mg/L) |
|
|
|
8.90 |
|
| Oxygen Saturation (%) |
More than 90 |
80 - 90 |
Less than 80 |
85.00 |
Satisfactory |
| Nitrate (mg/L) |
Less than 0.15 |
0.15 - 0.5 |
More than 0.5 |
5.50 |
BAD Very Degraded |
| Phosphate (mg/L) |
Less than 0.01 |
0.01 - 0.03 |
More than 0.03 |
0.22 |
Unsatisfactory |
| Turbidity (NTU) |
Less than 2 |
2.5 |
More than 5 |
2.00 |
|
| Temperature (°C) |
|
|
|
12.80 |
|
| Coliformes |
0-200 |
201-600 |
601-2000 |
0 |
Not Tested |
| E.Coli |
|
|
|
50 |
Excellent |
| Salmonella |
|
|
|
0 |
Not Tested |
| |
|
|
|
|
|
Conclusions:
Invertebrates found: cased caddis fly larvae, amphipods, Waterfleas, caddis fly larvae (free), water snails, segmented worms. By far the greatest number found were amphipods and segmented worms, which gives a pollution rating of poor.
The nitrate concentration was much higher than last year, 5.5 compared with 2.1 mg/L, however the phosphate was lower, 0.22 compared with 0.39 mg/L
The water was also tested at Southfield Drive for E.coli there were 150 CFU per 100 mL
Overall water quality ranking: Unsatisfactory
|
Additional
Comments:
Notes: * Ecan gives their results to elemental ‘P’, to get this from the PO4 divide the results by 3.07 to make a comparison.
**The E.coli counts were graded using the Microbiological Water Quality Guidelines for Marine and Freshwater Recreational Areas, although only one sample was tested. Published in June 2002 by the Ministry for the Environment Manatu Mo Te Taiao PO Box 10-362, Wellington, New Zealand. Updated in June 2003. ISBN: 0-478-24091-0 ME number: 474.This document is available under publications on the Ministry for the Environment’s website: www.mfe.govt.nz
E. coli is used as an indicator of contamination of drinking-water by faecal material. The Maximum allowed for E. coli is less than 1 E. coli in 100 mL of sample. Drinking-water Standards for New Zealand 2005. Colony Forming Units (CFUs) correspond to the number of bacteria in the sample. Colonies, made of millions of bacteria, and so visible to the naked eye, are counted. Each colony has grown from one bacterium in the sample when it incubated on a plate containing culture medium.
|
Date: Tuesday 17th Sep 2013
Weather: Sunny with a NE breeze
| Test |
Excellent |
Satisfactory |
Unsatisfactory |
|
Results |
Quality |
| pH |
7.8 |
6.5 - 8.9 |
Less than 6.5 or more than 9 |
7.10 |
Satisfactory |
| Conductivity (µS/cm) |
Less than 100 |
100 - 500 |
More than 500 |
220 |
Satisfactory |
| Dissolved Oxygen (mg/L) |
|
|
|
7.90 |
|
| Oxygen Saturation (%) |
More than 90 |
80 - 90 |
Less than 80 |
77.00 |
Unsatisfactory |
| Nitrate (mg/L) |
Less than 0.15 |
0.15 - 0.5 |
More than 0.5 |
2.10 |
BAD Very Degraded |
| Phosphate (mg/L) |
Less than 0.01 |
0.01 - 0.03 |
More than 0.03 |
0.39 |
Unsatisfactory |
| Turbidity (NTU) |
Less than 2 |
2.5 |
More than 5 |
2.00 |
|
| Temperature (°C) |
|
|
|
14.40 |
|
| Coliformes |
0-200 |
201-600 |
601-2000 |
0 |
Not Tested |
| E.Coli |
|
|
|
0 |
Not Tested |
| Salmonella |
|
|
|
0 |
Not Tested |
| |
|
|
|
|
|
Conclusions:
No record kept of invertebrates.
Place of test: 2468453E, 5729808N Near North Belt Bridge
Overall water quality ranking: Unsatisfactory
|
Additional
Comments:
* Ecan gives their results to elemental ‘P’, to get this from the PO4 divide the results by 3.07 to make a comparison.
**The E.coli counts were graded using the Microbiological Water Quality Guidelines for Marine and Freshwater Recreational Areas, although only one sample was tested. Published in June 2002 by the Ministry for the Environment Manatu Mo Te Taiao PO Box 10-362, Wellington, New Zealand. Updated in June 2003. ISBN: 0-478-24091-0 ME number: 474.This document is available under publications on the Ministry for the Environment’s website: www.mfe.govt.nz
E. coli is used as an indicator of contamination of drinking-water by faecal material. The Maximum allowed for E. coli is less than 1 E. coli in 100 mL of sample. Drinking-water Standards for New Zealand 2005. Colony Forming Units (CFUs) correspond to the number of bacteria in the sample. Colonies, made of millions of bacteria, and so visible to the naked eye, are counted. Each colony has grown from one bacterium in the sample when it incubated on a plate containing culture medium.
|
Date: Thursday 20th Sep 2012
Weather: Fine, no wind, air temperature cold, no rain in the previous few days.
Place of test: 2468453E, 5729808N Near North Belt Bridge
| Test |
Excellent |
Satisfactory |
Unsatisfactory |
|
Results |
Quality |
| pH |
7.8 |
6.5 - 8.9 |
Less than 6.5 or more than 9 |
6.90 |
Satisfactory |
| Conductivity (µS/cm) |
Less than 100 |
100 - 500 |
More than 500 |
240 |
Satisfactory |
| Dissolved Oxygen (mg/L) |
|
|
|
8.60 |
|
| Oxygen Saturation (%) |
More than 90 |
80 - 90 |
Less than 80 |
80.00 |
Satisfactory |
| Nitrate (mg/L) |
Less than 0.15 |
0.15 - 0.5 |
More than 0.5 |
3.40 |
BAD Very Degraded |
| Phosphate (mg/L) |
Less than 0.01 |
0.01 - 0.03 |
More than 0.03 |
0.34 |
Unsatisfactory |
| Turbidity (NTU) |
Less than 2 |
2.5 |
More than 5 |
2.03 |
Satisfactory |
| Temperature (°C) |
|
|
|
12.50 |
|
| Coliformes |
0-200 |
201-600 |
601-2000 |
1387 |
Unsatisfactory |
| E.Coli |
|
|
|
0 |
Not Tested |
| Salmonella |
|
|
|
2 |
Excellent |
| |
|
|
|
|
|
Conclusions:
Overall water quality ranking using macro invertebrate indicators: medium pollution
Overall water quality ranking: Unsatisfactory
|
Additional
Comments:
The Lincoln Environmental Organisation (LEO, Lincoln High School) together with Kidsfirst Kindergarten, Lincoln, helped by WaterWatch tested the Liffey stream on the 21st September 2012. We have been testing it for the last few years. We found that from the indicator invertebrates, the longer term water quality was “medium”, the dissolved nitrate level was 3.4mg/L which was higher than in May 2012 when it was 2.6mg/L, more than 6 times worse than unsatisfactory and the phosphate level was also was very high at 0.34 mg/L, but lower than last testing when it was 0.52 mg/L. We tested the spring water coming in below the stream testing site and found that nitrate was 3.3mg/L , similar to the stream, but lower than last testing) and phosphate was 0.18mg/L which was lower than last testing but still very high. In 2010 (not long after the earthquake)the indicator invertebrates showed the lowest number of species we had ever seen (only 2), in April 2011, 6 species were found, this time, in October, 5 species were found. This year (2012) in May, we found 6 species and September 2012 we only found 3 of the indicator invertebrate species this indicated stream health as degraded/poor.. . Note: The oxygen level depends a lot on the conditions on the day, such as how fast the water is flowing and how windy it is.
Notes: * Ecan gives their results to elemental ‘P’, to get this from the PO4 divide the results by 3.07 to make a comparison.
**The E.coli counts were graded using the Microbiological Water Quality Guidelines for Marine and Freshwater Recreational Areas, although only one sample was tested. Published in June 2002 by the Ministry for the Environment Manatu Mo Te Taiao PO Box 10-362, Wellington, New Zealand. Updated in June 2003. ISBN: 0-478-24091-0 ME number: 474.This document is available under publications on the Ministry for the Environment’s website: www.mfe.govt.nz
E. coli is used as an indicator of contamination of drinking-water by faecal material. The Maximum allowed for E. coli is less than 1 E. coli in 100 mL of sample. Drinking-water Standards for New Zealand 2005. Colony Forming Units (CFUs) correspond to the number of bacteria in the sample. Colonies, made of millions of bacteria, and so visible to the naked eye, are counted. Each colony has grown from one bacterium in the sample when it incubated on a plate containing culture medium.
|
Date: Thursday 20th Sep 2012
Weather: Place of test: 2468453E, 5729808N Near North Belt Bridge
Weather conditions: Fine, no wind, air temperature cold, no rain in the previous few days.
We also tested a spring coming out of the bank at the same location:
| Test |
Excellent |
Satisfactory |
Unsatisfactory |
|
Results |
Quality |
| pH |
7.8 |
6.5 - 8.9 |
Less than 6.5 or more than 9 |
7.10 |
Satisfactory |
| Conductivity (µS/cm) |
Less than 100 |
100 - 500 |
More than 500 |
336 |
Satisfactory |
| Dissolved Oxygen (mg/L) |
|
|
|
8.20 |
|
| Oxygen Saturation (%) |
More than 90 |
80 - 90 |
Less than 80 |
78.00 |
Unsatisfactory |
| Nitrate (mg/L) |
Less than 0.15 |
0.15 - 0.5 |
More than 0.5 |
3.30 |
BAD Very Degraded |
| Phosphate (mg/L) |
Less than 0.01 |
0.01 - 0.03 |
More than 0.03 |
0.18 |
Unsatisfactory |
| Turbidity (NTU) |
Less than 2 |
2.5 |
More than 5 |
2.03 |
Satisfactory |
| Temperature (°C) |
|
|
|
12.50 |
|
| Coliformes |
0-200 |
201-600 |
601-2000 |
0 |
Not Tested |
| E.Coli |
|
|
|
1257 |
Excellent |
| Salmonella |
|
|
|
0 |
Not Tested |
| |
|
|
|
|
|
Conclusions:
Overall water quality ranking using macro invertebrate indicators: Not applicable
Overall water quality ranking: Unsatisfactory
|
Additional
Comments:
The spring supplying the Liffey stream is already highly contaminated with nitrates and phosphates. |
Date: Thursday 17th May 2012
Weather: Fine, no wind, air temperature cold, no rain in the previous few days. PLACE OF TEST: 2468453E, 5729808N Near North Belt Bridge
| Test |
Excellent |
Satisfactory |
Unsatisfactory |
|
Results |
Quality |
| pH |
7.8 |
6.5 - 8.9 |
Less than 6.5 or more than 9 |
7.30 |
Satisfactory |
| Conductivity (µS/cm) |
Less than 100 |
100 - 500 |
More than 500 |
254 |
Satisfactory |
| Dissolved Oxygen (mg/L) |
|
|
|
7.33 |
|
| Oxygen Saturation (%) |
More than 90 |
80 - 90 |
Less than 80 |
70.40 |
Unsatisfactory |
| Nitrate (mg/L) |
Less than 0.15 |
0.15 - 0.5 |
More than 0.5 |
2.60 |
BAD Very Degraded |
| Phosphate (mg/L) |
Less than 0.01 |
0.01 - 0.03 |
More than 0.03 |
0.52 |
Unsatisfactory |
| Turbidity (NTU) |
Less than 2 |
2.5 |
More than 5 |
2.03 |
Satisfactory |
| Temperature (°C) |
|
|
|
13.00 |
|
| Coliformes |
0-200 |
201-600 |
601-2000 |
468 |
Satisfactory |
| E.Coli |
|
|
|
6 |
Excellent |
| Salmonella |
|
|
|
12 |
Excellent |
| |
|
|
|
|
|
Conclusions:
Overall water quality ranking using macro invertebrate indicators: medium pollution
Overall water quality ranking: Satisfactory
|
Additional
Comments:
The Lincoln Environmental Organisation (LEO, Lincoln High School) helped by WaterWatch tested the Liffey stream on the 18th May 2012. We have been testing it for the last few years. We found that from the indicator invertebrates, the longer term water quality was “medium”, the dissolved nitrate level was 2.6mg/L which was lower than in October 2011 when it was 3.1mg/L but it was still more than 6 times worse than unsatisfactory and the phosphate level was also was very high at 0.52 mg/L, higher than last testing when it was 0.45mg/L. We tested the spring water coming in below the stream testing site and found that nitrate was 6.0mg/L , much higher than the stream above that point and phosphate was 0.35mg/L which was lower, but still very high. In 2010 (not long after the earthquake)the indicator invertebrates showed the lowest number of species we had ever seen (only 2), in April 2011, 6 species were found, this time, in October, 5 species were found. This year (2012) we found 6 species. Note: The oxygen level depends a lot on the conditions on the day, such as how fast the water is flowing and how windy it is.
Notes: * Ecan gives their results to elemental ‘P’, to get this from the PO4 divide the results by 3.07 to make a comparison.
**The E.coli counts were graded using the Microbiological Water Quality Guidelines for Marine and Freshwater Recreational Areas, although only one sample was tested. Published in June 2002 by the Ministry for the Environment Manatu Mo Te Taiao PO Box 10-362, Wellington, New Zealand. Updated in June 2003. ISBN: 0-478-24091-0 ME number: 474.This document is available under publications on the Ministry for the Environment’s website: www.mfe.govt.nz
E. coli is used as an indicator of contamination of drinking-water by faecal material. The Maximum allowed for E. coli is less than 1 E. coli in 100 mL of sample. Drinking-water Standards for New Zealand 2005. Colony Forming Units (CFUs) correspond to the number of bacteria in the sample. Colonies, made of millions of bacteria, and so visible to the naked eye, are counted. Each colony has grown from one bacterium in the sample when it incubated on a plate containing culture medium.
|
Date: Thursday 17th May 2012
Weather: Fine, no wind, air temperature cold, no rain in the previous few days. PLACE OF TEST: Spring coming out of the bank at the same location
| Test |
Excellent |
Satisfactory |
Unsatisfactory |
|
Results |
Quality |
| pH |
7.8 |
6.5 - 8.9 |
Less than 6.5 or more than 9 |
6.90 |
Satisfactory |
| Conductivity (µS/cm) |
Less than 100 |
100 - 500 |
More than 500 |
329 |
Satisfactory |
| Dissolved Oxygen (mg/L) |
|
|
|
7.93 |
|
| Oxygen Saturation (%) |
More than 90 |
80 - 90 |
Less than 80 |
75.30 |
Unsatisfactory |
| Nitrate (mg/L) |
Less than 0.15 |
0.15 - 0.5 |
More than 0.5 |
4.10 |
BAD Very Degraded |
| Phosphate (mg/L) |
Less than 0.01 |
0.01 - 0.03 |
More than 0.03 |
0.23 |
Unsatisfactory |
| Turbidity (NTU) |
Less than 2 |
2.5 |
More than 5 |
0.05 |
Excellent |
| Temperature (°C) |
|
|
|
0.00 |
|
| Coliformes |
0-200 |
201-600 |
601-2000 |
0 |
Not Tested |
| E.Coli |
|
|
|
0 |
Not Tested |
| Salmonella |
|
|
|
0 |
Not Tested |
| |
|
|
|
|
|
Conclusions:
Overall water quality ranking using macro invertebrate indicators: Not applicable
Overall water quality ranking: Satisfactory
|
Additional
Comments:
The spring supplying the Liffey stream is already highly contaminated with nitrates and phosphates. |
Date: Wednesday 5th Oct 2011
Weather: Overcast, no wind, air temperature 11 degrees, rain in the previous few days. Place of test: 2468453E, 5729808N Near North Belt Bridge
| Test |
Excellent |
Satisfactory |
Unsatisfactory |
|
Results |
Quality |
| pH |
7.8 |
6.5 - 8.9 |
Less than 6.5 or more than 9 |
6.90 |
Satisfactory |
| Conductivity (µS/cm) |
Less than 100 |
100 - 500 |
More than 500 |
263 |
Satisfactory |
| Dissolved Oxygen (mg/L) |
|
|
|
8.20 |
|
| Oxygen Saturation (%) |
More than 90 |
80 - 90 |
Less than 80 |
72.10 |
Unsatisfactory |
| Nitrate (mg/L) |
Less than 0.15 |
0.15 - 0.5 |
More than 0.5 |
3.10 |
BAD Very Degraded |
| Phosphate (mg/L) |
Less than 0.01 |
0.01 - 0.03 |
More than 0.03 |
0.45 |
Unsatisfactory |
| Turbidity (NTU) |
Less than 2 |
2.5 |
More than 5 |
0.14 |
Excellent |
| Temperature (°C) |
|
|
|
12.20 |
|
| Coliformes |
0-200 |
201-600 |
601-2000 |
413 |
Satisfactory |
| E.Coli |
|
|
|
72 |
Excellent |
| Salmonella |
|
|
|
36 |
Excellent |
| |
|
|
|
|
|
Conclusions:
Overall water quality ranking using macro invertebrate indicators: medium
Overall water quality ranking: Satisfactory
|
Additional
Comments:
The Lincoln Environmental Organisation (LEO) helped by WaterWatch tested the Liffey stream on the 6th October 2011. We have been testing it for the last few years. We found that from the indicator invertebrates, the longer term water quality was “medium”, the dissolved nitrate level was 3.1mg/L which was lower than in April when it was 5.1 mg/L but it was still more than 6 times worse than unsatisfactory and the phosphate level was also was very high at 0.45 mg/L. Last year the indicator invertebrates showed the lowest number of species we had ever seen (only 2), this year in April, 6 species were found, this time, in October, 5 species were found.
Note: The oxygen level depends a lot on the conditions on the day, such as how fast the water is flowing and how windy it is.
Note: The E.coli count (with each colony corresponding to one bacterium in the sample) were graded using the Microbiological Water Quality Guidelines for Marine and Freshwater Recreational Areas, although only one sample was tested.
Published in June 2002 by the Ministry for the Environment Manatu Mo Te Taiao PO Box 10-362, Wellington, New Zealand. Updated in June 2003. ISBN: 0-478-24091-0 ME number: 474.This document is available under publications on the Ministry for the Environment’s website: www.mfe.govt.nz
E. coli is used as an indicator of contamination of drinking-water by faecal material. The Maximum allowed for E. coli is less than 1 E. coli in 100 mL of sample. Drinking-water Standards for New Zealand 2005
|
Date: Tuesday 10th May 2011
Weather: Overcast
| Test |
Excellent |
Satisfactory |
Unsatisfactory |
|
Results |
Quality |
| pH |
7.8 |
6.5 - 8.9 |
Less than 6.5 or more than 9 |
6.90 |
Satisfactory |
| Conductivity (µS/cm) |
Less than 100 |
100 - 500 |
More than 500 |
260 |
Satisfactory |
| Dissolved Oxygen (mg/L) |
|
|
|
8.90 |
|
| Oxygen Saturation (%) |
More than 90 |
80 - 90 |
Less than 80 |
90.00 |
Satisfactory |
| Nitrate (mg/L) |
Less than 0.15 |
0.15 - 0.5 |
More than 0.5 |
5.10 |
BAD Very Degraded |
| Phosphate (mg/L) |
Less than 0.01 |
0.01 - 0.03 |
More than 0.03 |
0.05 |
Unsatisfactory |
| Turbidity (NTU) |
Less than 2 |
2.5 |
More than 5 |
0.00 |
Excellent |
| Temperature (°C) |
|
|
|
14.70 |
|
| Coliformes |
0-200 |
201-600 |
601-2000 |
138 |
Excellent |
| E.Coli |
|
|
|
13 |
Excellent |
| Salmonella |
|
|
|
13 |
Excellent |
| |
|
|
|
|
|
Conclusions:
The Lincoln Environmental Organisation (LEO) helped by WaterWatch tested the Liffey stream on the 11th April. We have been testing it for the last few years. We found that from the indicator invertebrates, the water was “good”, as were most of the indicators, which was quite a difference form previous years. This might have been due to no recent rain and to the fact the sampling was done near a spring. However the dissolved nitrate level was 5.1 mg/L which is more than 10 times worse than unsatisfactory and the phosphate level was also was very high at 0.05 mg/L. The coli count was the lowest we have ever found it at 137.5 CFU’s per 100mL. Last year the results were 3281 CFU’s per 100mL, where over 2000 is counted as degraded.
Overall water quality ranking: Satisfactory
|
Additional
Comments:
Last year the indicator invertebrates showed the lowest number of species we had ever seen (only 2), this year 6 species were found. |
Date: Sunday 2nd May 2010
Weather: Overcast, no wind, There had been below average rain all summer, and no recent rain.
| Test |
Excellent |
Satisfactory |
Unsatisfactory |
|
Results |
Quality |
| pH |
7.8 |
6.5 - 8.9 |
Less than 6.5 or more than 9 |
6.80 |
Satisfactory |
| Conductivity (µS/cm) |
Less than 100 |
100 - 500 |
More than 500 |
303 |
Satisfactory |
| Dissolved Oxygen (mg/L) |
|
|
|
7.36 |
|
| Oxygen Saturation (%) |
More than 90 |
80 - 90 |
Less than 80 |
69.90 |
Unsatisfactory |
| Nitrate (mg/L) |
Less than 0.15 |
0.15 - 0.5 |
More than 0.5 |
4.90 |
BAD Very Degraded |
| Phosphate (mg/L) |
Less than 0.01 |
0.01 - 0.03 |
More than 0.03 |
0.15 |
Unsatisfactory |
| Turbidity (NTU) |
Less than 2 |
2.5 |
More than 5 |
7.89 |
Unsatisfactory |
| Temperature (°C) |
|
|
|
12.80 |
|
| Coliformes |
0-200 |
201-600 |
601-2000 |
3281 |
Degraded |
| E.Coli |
|
|
|
24 |
Excellent |
| Salmonella |
|
|
|
19 |
Excellent |
| |
|
|
|
|
|
Conclusions:
The Lincoln Environmental Organisation (LEO) helped by LET and WaterWatch tested the Liffey stream on the 3rd May 2010. We have been testing it for the last few years. We found that from the indicator invertebrates, the water was “degraded”, the Dissolved Oxygen was only 69.9% which is “unsatisfactory”, the dissolved nitrate level was 4.0 mg/L which is 10 times worse than unsatisfactory, the dissolved phosphate levels were 0.15mg/L (anything higher than 0.5 is unsatisfactory).
The coli count was 3281 CFU’s per 100mL, where over 2000 is counted as degraded, however the count of E.coli and salmonella was very low, which was unusual, as it is usually high. This was probably because it has been very dry with no water runoff. The water in the stream would have come from the springs.
The indicator invertebrates showed the lowest number of species we had ever seen (only 2)
Overall water quality ranking: Degraded Poor
|
Additional
Comments:
|
Date: Friday 3rd Apr 2009
Weather: Fine with a light NE wind
| Test |
Excellent |
Satisfactory |
Unsatisfactory |
|
Results |
Quality |
| pH |
7.8 |
6.5 - 8.9 |
Less than 6.5 or more than 9 |
6.80 |
Satisfactory |
| Conductivity (µS/cm) |
Less than 100 |
100 - 500 |
More than 500 |
303 |
Satisfactory |
| Dissolved Oxygen (mg/L) |
|
|
|
8.47 |
|
| Oxygen Saturation (%) |
More than 90 |
80 - 90 |
Less than 80 |
77.50 |
Unsatisfactory |
| Nitrate (mg/L) |
Less than 0.15 |
0.15 - 0.5 |
More than 0.5 |
7.00 |
BAD Very Degraded |
| Phosphate (mg/L) |
Less than 0.01 |
0.01 - 0.03 |
More than 0.03 |
0.04 |
Unsatisfactory |
| Turbidity (NTU) |
Less than 2 |
2.5 |
More than 5 |
2.98 |
Satisfactory |
| Temperature (°C) |
|
|
|
14.80 |
|
| Coliformes |
0-200 |
201-600 |
601-2000 |
0 |
Not Tested |
| E.Coli |
|
|
|
0 |
Not Tested |
| Salmonella |
|
|
|
0 |
Not Tested |
| |
|
|
|
|
|
Conclusions:
Aquatic invertrabrates: Pollution tolerance rating: Poor
These results could point to the spring discharge coming from a shallow aquifer. As the nitrate levels from deeper wells are nowhere near this level.
Overall water quality ranking: Degraded Poor
|
Additional
Comments:
|
Date: Wednesday 12th Nov 2008
Weather: Fine with light NE wind, no rainfall at least week before if not longer.
| Test |
Excellent |
Satisfactory |
Unsatisfactory |
|
Results |
Quality |
| pH |
7.8 |
6.5 - 8.9 |
Less than 6.5 or more than 9 |
7.00 |
Satisfactory |
| Conductivity (µS/cm) |
Less than 100 |
100 - 500 |
More than 500 |
230 |
Satisfactory |
| Dissolved Oxygen (mg/L) |
|
|
|
7.90 |
|
| Oxygen Saturation (%) |
More than 90 |
80 - 90 |
Less than 80 |
77.50 |
Unsatisfactory |
| Nitrate (mg/L) |
Less than 0.15 |
0.15 - 0.5 |
More than 0.5 |
2.00 |
BAD Very Degraded |
| Phosphate (mg/L) |
Less than 0.01 |
0.01 - 0.03 |
More than 0.03 |
0.37 |
Unsatisfactory |
| Turbidity (NTU) |
Less than 2 |
2.5 |
More than 5 |
2.00 |
Satisfactory |
| Temperature (°C) |
|
|
|
14.50 |
|
| Coliformes |
0-200 |
201-600 |
601-2000 |
1400 |
Unsatisfactory |
| E.Coli |
|
|
|
885 |
Excellent |
| Salmonella |
|
|
|
77 |
Excellent |
| |
|
|
|
|
|
Conclusions:
Aquatic invertrabrates used as environmental indicators:
Most dominant group: amphipods - Tolerance rating = Medium
Next most dominant group: segmented worms - Tolerance rating = Low
Overall water quality ranking: Degraded Poor
|
Additional
Comments:
As we have found last year a big increase in the nitrate levels from the small spring ! |
Date: Monday 21st Apr 2008
Weather: Chilly southerly, fine with some cloud. Rained recently
| Test |
Excellent |
Satisfactory |
Unsatisfactory |
|
Results |
Quality |
| pH |
7.8 |
6.5 - 8.9 |
Less than 6.5 or more than 9 |
7.20 |
Satisfactory |
| Conductivity (µS/cm) |
Less than 100 |
100 - 500 |
More than 500 |
100 |
Satisfactory |
| Dissolved Oxygen (mg/L) |
|
|
|
8.64 |
|
| Oxygen Saturation (%) |
More than 90 |
80 - 90 |
Less than 80 |
78.30 |
Unsatisfactory |
| Nitrate (mg/L) |
Less than 0.15 |
0.15 - 0.5 |
More than 0.5 |
1.00 |
Unsatisfactory degraded |
| Phosphate (mg/L) |
Less than 0.01 |
0.01 - 0.03 |
More than 0.03 |
0.04 |
Unsatisfactory |
| Turbidity (NTU) |
Less than 2 |
2.5 |
More than 5 |
12.00 |
Unsatisfactory |
| Temperature (°C) |
|
|
|
10.60 |
|
| Coliformes |
0-200 |
201-600 |
601-2000 |
1400 |
Unsatisfactory |
| E.Coli |
|
|
|
885 |
Excellent |
| Salmonella |
|
|
|
77 |
Excellent |
| |
|
|
|
|
|
Conclusions:
Aquatic invertrabrates used as environmental indicators:
Most dominant group: amphipods - Tolerance rating = Medium
Next most dominant group: segmented worms - Tolerance rating = Low
Overall water quality ranking: Degraded Poor
|
Additional
Comments:
The water testing was arranged as part of the Lincoln Envirotown monitoring of Lincoln township.
The equipment and expertise was supplied by Lincoln University Waterwatch team run by Kelvin Nicolle.
Local residents, children, and visitors from Christchurch (Mr and Mrs Cargo aged 86) carried out the testing with help from the Lincoln University team and the High school LEO (Lincoln Environmental Organisation).
The results were generally very disappointing, although there was less phosphate than the previous testing, possibly because the recent rain diluted the water. The high nitrate and phosphate levels probably come from the spring water. |
Date: Monday 6th Aug 2007
Weather: Cloudy
| Test |
Excellent |
Satisfactory |
Unsatisfactory |
|
Results |
Quality |
| pH |
7.8 |
6.5 - 8.9 |
Less than 6.5 or more than 9 |
6.80 |
Satisfactory |
| Conductivity (µS/cm) |
Less than 100 |
100 - 500 |
More than 500 |
187 |
Satisfactory |
| Dissolved Oxygen (mg/L) |
|
|
|
9.30 |
|
| Oxygen Saturation (%) |
More than 90 |
80 - 90 |
Less than 80 |
87.10 |
Satisfactory |
| Nitrate (mg/L) |
Less than 0.15 |
0.15 - 0.5 |
More than 0.5 |
2.10 |
BAD Very Degraded |
| Phosphate (mg/L) |
Less than 0.01 |
0.01 - 0.03 |
More than 0.03 |
0.18 |
Unsatisfactory |
| Turbidity (NTU) |
Less than 2 |
2.5 |
More than 5 |
5.40 |
Unsatisfactory |
| Temperature (°C) |
|
|
|
11.70 |
|
| Coliformes |
0-200 |
201-600 |
601-2000 |
284 |
Satisfactory |
| E.Coli |
|
|
|
157 |
Excellent |
| Salmonella |
|
|
|
77 |
Excellent |
| |
|
|
|
|
|
Conclusions:
Aquatic invertrabrates used as environmental indicators:
Most dominant group: amphipods - Tolerance rating = Medium
Next most dominant group: segmented worms - Tolerance rating = Low
Overall water quality ranking: Degraded
|
Additional
Comments:
There had been heavy rain the previous day before this test. |
|
