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....61 7.48 7.61 7.48 7.60 7.56 pH 8.36 8.39 8.39 8.39 8.41 8.42 Secchi Disc Depth (m) Turbidity (NTU) 0.45 0.43 0.75 0.40 0.45 0.68 Suspended Solids (mg/L) 2.90 3.50 5.25 3.15 2.75 5.65 5-Day Biochemical Oxygen Demand (mg/L) <2 <2 <2 <2 <2 <2 Ammoniacal Nitrogen (mg/L) 0.14 0.08 0.11 0.12 0.09 0.09...

....236 0.209 0.263 0.255 0.243 Unionized Ammonia (mg/L) 0.021 0.012 0.017 0.014 0.003 <0.001 Nitrite Nitrogen (mg/L) 0.19 0.09 0.18 0.17 0.19 0.08 Nitrate Nitrogen (mg/L) 1.78 1.16 1.80 1.36 1.76 1.13 Total Inorganic Nitrogen (mg/L) 2.25 1.49 2.19 1.79 2.21 1.45 Total Kjeldahl Nitrogen (mg/L) 0.21 0.12 0...

... phosphorus (mg/L) 0.09 0.08 0.06 0.09 0.09 0.09 TP (mg/L) 0.11 0.11 0.12 0.12 0.12 0.11 Chlorophyll-a (µg/L) 3.98 5.18 3.86 13.39 4.72 4.39 E. coli (CFU/100 mL) 0 0 25 5 0 0 Fecal coliforms (CFU/100 mL) 105 440 175 1270 180 760 Yan Chau Tong Lai Chi Wo Kau Ma Shek 3 1 1 1 30.6 31.5 31.1 4 3 ...

... Oxygen (mg/L) 7.04 8.05 8.29 8.09 10.41 9.87 pH 8.13 8.15 8.15 8.14 8.19 8.08 Secchi Disc Depth (m) Turbidity (NTU) 21.60 1.80 2.50 2.60 134.50 1.50 Suspended Solids (mg/L) 17.60 16.20 14.60 23.40 15.60 16.00 5-Day Biochemical Oxygen Demand 1.20 1.00 0.60 0.90 1.20 1.70 Ammoniacal Nitrogen (mg/L) 0.007 0...

... Water Quality Data of Hoi Ha Wan Marine Park from January to March 2019 (1st Quarter) Water Depth Surface Bottom Surface Bottom Surface Bottom Surface Bottom Air Temperature (°C) Temperature (°C) 18.70 18.60 18.90 18.70 18.80 18.80 19.00 19.00 Salinity (‰) 32.05 32.05 32.09 32.10 32.08 32.05 32.09...

....16 0.17 0.13 Unionized Ammonia (mg/L) <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Nitrite Nitrogen (mg/L) 0.11 0.09 0.09 0.08 0.09 0.07 Nitrate Nitrogen (mg/L) 0.89 0.70 0.90 0.75 0.85 0.65 Total Inorganic Nitrogen (mg/L) 1.20 1.00 1.15 0.97 1.10 0.84 Total Kjeldahl Nitrogen (mg/L) 0.36 0.49 0.36 0.49 0.42 0...

... ammonia (mg/L) 0.007 0.009 0.003 0.005 0.004 0.006 Nitrite nitrogen (mg/L) 0.05 0.01 0.07 0.02 0.08 0.01 Nitrate nitrogen (mg/L) 0.14 0.21 0.12 0.19 0.13 0.18 TIN (mg/L) 0.24 0.24 0.22 0.26 0.25 0.24 TKN (mg/L) 0.51 0.41 0.54 0.74 0.57 0.6 TN (mg/L) 0.7 0.63 0.74 0.95 0.78 0.8 Orthophosphate phosphorus...

....51 0.44 0.58 Total Nitrogen (mg/L) 1.40 0.98 1.00 0.99 0.98 0.99 Orthophosphate Phosphorus (mg/L) <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 Total Phosphorus (mg/L) 0.06 0.08 0.05 0.06 0.05 0.05 Chlorophyll-a (μg/L) 1.90 0.98 1.25 1.01 1.45 1.05 E. coli (cfu/100 mL) 30 230 83 132 31 150 Faecal Coliforms...

...) <2 <2 <2 <2 <2 <2 <2 <2 Ammoniacal Nitrogen (mg/L) <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Unionized Ammonia (mg/L) <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Nitrite Nitrogen (mg/L) 0.08 0.04 0.04 0.06 0.03 0.04 0.03 0.04 Nitrate Nitrogen (mg/L) 0.14 0.16 0.16 0.17 0.16 0.17 0.16 0.17...

... 5.22 6.00 5.71 5.12 pH 8.13 8.10 8.08 8.10 8.17 8.10 Secchi Depth (m) Turbidity (NTU) 2.23 3.73 5.13 0.90 3.30 4.43 Suspended Solids (mg/L) 3.17 4.42 4.62 3.43 4.00 4.35 BOD (mg/L) 0.91 0.96 1.00 0.90 0.81 0.69 Ammoniacal Nitrogen (mg/L) 0.126 0.419 0.097 0.040 0.073 0.066 Unionized Ammonia (mg/L) 0...