Waimānalo Wastewater Treatment Plant - Waste water by the numbers

  • Analysis of Fecal Coliform from 2013-2022 showed a downward trend ending at ~350,000 Colony Forming Units of Fecal Indicator Bacteria per gallon, well below where concentrations began in 2013 at ~35,000,000.

    Space

  • Injected concentrations of Nitrogen from Waimanalo Wastewater Treatment Plant from 2013-2022 showed a downward trend ending at about 2 mg/L. During 2016 concentrations of Nitrogen reached as high as ~36 mg/L.

    Space

  • Injected concentration of Phosphorus from 2013-2022 showed an increasing trend ending at a concentration of 2.25 mg/L.

    Space

  • Turbidity of the effluent at Waimanalo Wastewater Treatment Plant from 2013-2022 shows a slight downwards trend ending at ~0.5 NTU.

    Space
  • Waimānalo Wastewater Treatment Plant Quality History
    Date Turbidity (NTU) Total Nitrogen (mg/L) Total Phosphorus (mg/L) Enterococcous Fecal Indicator Bacteria (Geomean) CFU/100mL
    11/4/2013 1.03 3.1 0.33 940,000
    12/30/2013 0.81 NA NA NA
    1/6/2014 1.05 NA NA NA
    2/18/2014 1.47 13.4 1.26 560,000
    3/3/2014 0.73 NA NA NA
    4/1/2014 1.3 NA NA NA
    5/12/2014 0.82 6.3 0.72 26,000
    6/2/2014 0.99 NA NA NA
    7/7/2014 0.86 NA NA NA
    8/4/2014 0.94 8.5 1.42 120,000
    9/15/2014 1.12 NA NA NA
    10/6/2014 0.71 NA NA NA
    11/5/2014 0.89 6.6 0.27 48,000
    12/1/2014 0.79 NA NA NA
    1/5/2015 1.03 NA NA NA
    2/2/2015 0.59 11.1 0.73 64,000
    3/2/2015 0.78 NA NA NA
    4/6/2015 0.66 NA NA NA
    5/18/2015 0.86 4.4 0.57 23,000
    6/1/2015 0.89 NA NA NA
    7/20/2015 0.8 NA NA NA
    8/10/2015 1.06 6.7 1.85 130,000
    9/8/2015 1.22 NA NA NA
    10/5/2015 0.96 NA NA NA
    11/16/2015 1.23 19.2 3.83 230,000
    12/7/2015 1.6 NA NA NA
    1/4/2016 9.12 NA NA NA
    2/16/2016 13.65 36.3 1.91 240,000
    3/7/2016 14.4 NA NA NA
    4/4/2016 3.29 NA NA NA
    5/16/2016 0.87 14.4 1.53 160,000
    6/13/2016 1.25 NA NA NA
    7/5/2016 1.63 NA NA NA
    8/8/2016 0.92 10.2 0.19 48,000
    9/6/2016 0.79 NA NA NA
    10/3/2016 1.91 NA NA NA
    11/9/2016 0.98 NA NA NA
    12/5/2016 0.65 NA NA NA
    1/3/2017 1.1 NA NA NA
    2/21/2017 0.76 3.1 0.43 <130
    3/6/2017 0.68 NA NA NA
    4/3/2017 1.19 NA NA NA
    5/15/2017 1.22 1.1 1.42 29,000
    6/7/2017 1.16 NA NA NA
    7/10/2017 0.9 NA NA NA
    8/14/2017 1.52 4.8 1.57 28,000
    9/5/2017 0.74 NA NA NA
    10/2/2017 0.8 NA NA NA
    11/20/2017 0.8 1.8 1.57 8,600
    12/4/2017 0.52 NA NA NA
    1/2/2018 4.57 NA NA NA
    2/5/2018 0.46 8.1 1.64 150,000
    3/5/2018 0.48 NA NA NA
    4/2/2018 0.67 NA NA NA
    5/15/2018 0.77 4.3 0.44 84,000
    6/6/2018 0.41 NA NA NA
    7/2/2018 0.47 NA NA NA
    8/6/2018 0.52 1.6 0.13 66,000
    11/7/2018 0.37 1.4 2.38 48,000
    5/6/2019 0.32 2.1 0.33 51,000
    11/4/2019 0.52 1.5 1.03 13,000
    5/11/2020 0.37 0.8 1.99 4,000
    11/9/2020 0.51 1 2.01 53,000
    5/10/2021 0.43 0.9 1.49 26,000
    11/8/2021 1.05 0.7 1.23 190,000
    5/9/2022 0.57 <1.9 0.46 7,300
    5/31/2022 0.66 <1.9 1.76 160,000
    11/14/2022 0.49 <1.9 2.23 9,500

    NA = No data available

How does the water I flush affect our reefs?

Learn About The Effects On Our Reefs