Full sub-catchment nutrient reports from the priority sub-catchments are produced every five years. These include trends in total nitrogen (TN) and total phosphorus (TP) concentrations, which are used as a basis for comparison to determine if the nutrient management actions put in place by the Parks and Wildlife Service are having a positive impact. Updates to nutrient summary information are provided as available. 

Sub-catchmentFull report (2016)Update (2017)Update (2018)
Avon River pdfAvon River catchment nutrient report 2016 4.15 MB pdfAvon River catchment nutrient report 2017 update 553.22 KB pdfAvon River catchment nutrient report 2018 update553.43 KB
Bannister Creek pdfBannister Creek catchment nutrient report 2016 4.97 MB pdfBannister Creek Catchment nutrient report 2017 update 1.03 MB pdfBannister Creek catchment nutrient report 2018 update1.03 MB
Bayswater Main Drain pdfBayswater Main Drain catchment nutrient report 2016 4.80 MB pdfBayswater Main Drain Catchment nutrient report 2017 update 932.75 KB  pdfBayswater Main Drain Catchment nutrient report 2018 update932.76 KB
Bennett Brook pdfBennett Brook catchment nutrient report 2016 6.64 MB pdfBennett Brook catchment nutrient report 2017 update 2.83 MB pdfBennett Brook catchment nutrient report 2018 update1.81 MB
Bickley Brook pdfBickley Brook catchment nutrient report 2016 4.55 MB     pdfBickley Brook catchment nutrient report 2017 update 944.90 KB pdfBickley Brook catchment nutrient report 2018 update944.54 KB
Blackadder Creek pdfBlackadder Creek catchment nutrient report 2016 7.78 MB   pdfBlackadder Creek catchment nutrient report 2017 update 1.52 MB pdfBlackadder Creek catchment nutrient report 2018 update1.52 MB
 Bull Creek pdfBull Creek catchment nutrient report 2016 3.20 MB pdfBull Creek catchment nutrient report 2017 update 1.08 MB pdfBull Creek catchment nutrient report 2018 update1.08 MB
 Claisebrook pdfClaisebrook catchment nutrient report 2016 5.05 MB pdfClaisebrook catchment nutrient report 2017 update 1.20 MB pdfClaisebrook catchment nutrient report 2018 update1.20 MB
 Ellen Brook pdfEllen Brook catchment nutrient report 2016 3.65 MB pdfEllen Brook catchment nutrient report 2017 update 1.00 MB pdfEllen Brook catchment nutrient report 2018 update1.00 MB 
 Ellis Brook pdfEllis Brook catchment nutrient report 2016 6.12 MB pdfEllis Brook catchment nutrient report 2017 update 1.09 MB pdfEllis Brook catchment nutrient report 2018 update1.09 MB
Helena River pdfHelena River catchment nutrient report 2016 4.61 MB pdfHelena River catchment nutrient report 2017 update 837 KB pdfHelena River catchment nutrient report 2018 update836.93 KB
 Helm Street pdfHelm Street catchment nutrient report 2016 7.22 MB pdfHelm Street catchment nutrient report 2017 update 1.23 MB pdfHelm Street catchment nutrient report 2018 update1.23 MB
 Henley Brook pdfHenley Brook catchment nutrient report 2016 621.75 KB pdfHenley Brook catchment nutrient report 2017 update 621.75 KB pdfHenley Brook catchment nutrient report 2018 update621.77 KB
 Jane Brook pdfJane Brook catchment nutrient report 2016 8.33 MB pdfJane Brook catchment nutrient report 2017 update 1.23 MB pdfJane Brook catchment nutrient report 2018 update1.23 MB
 Lower Canning pdfLower Canning catchment nutrient report 2016 5.00 MB pdfLower Canning catchment nutrient report 2017 update 1.01 MB pdfLower Canning catchment nutrient report 2018 update1.01 MB
 Maylands pdfMaylands catchment nutrient report 2016 4.79 MB pdfMaylands catchment nutrient report 2017 update 565.33 KB pdfMaylands catchment nutrient report 2018 update565.66 KB
 Mills Street pdfMills Street Main Drain catchment nutrient report 2016 4.92 MB pdfMills Street Main Drain catchment nutrient report 2017 update 949.85 KB pdfMills Street Main Drain catchment nutrient report 2018 update949.96 KB
 Perth Airport North pdfPerth Airport North catchment nutrient report 2016 6.36 MB pdfPerth Airport North catchment nutrient report 2017 update 937.24 KB pdfPerth Airport North catchment nutrient report 2018 update937.34 KB
Perth Airport South pdfPerth Airport South catchment nutrient report 2016 7.32 MB pdfPerth Airport South catchment nutrient report 2017 update 1.16 MB pdfPerth Airport South catchment nutrient report 2018 update1.16 MB
South Belmont pdfSouth Belmont Main Drain catchment nutrient report 2016 6.3 MB pdfSouth Belmont Main Drain catchment nutrient report 2017 update 1.10 MB pdfSouth Belmont Main Drain catchment nutrient report 2018 update1.10 MB
South Perth pdfSouth Perth catchment nutrient report 2016 4.15 MB pdfSouth Perth catchment nutrient report 2017 update 1.58 MB pdfSouth Perth catchment nutrient report 2018 update1.59 MB
Southern River pdfSouthern River catchment nutrient report 2016 3.7 MB pdfSouthern River catchment nutrient report 2017 update 1.02 MB pdfSouthern River catchment nutrient report 2018 update1.11 MB
St Leonards Creek pdfSt Leonards Creek catchment nutrient report 2016 5.37 MB pdfSt Leonards Creek catchment nutrient report 2017 update 851.31 KB pdfSt Leonards Creek catchment nutrient report 2018 update851.25 KB
Susannah Brook pdfSusannah Brook catchment nutrient report 2016 6.22 MB pdfSusannah Brook catchment nutrient report 2017 update 1.39 MB pdfSusannah Brook catchment nutrient report 2018 update1.38 MB
Upper Canning River   pdfUpper Canning River catchment nutrient report 2016 5.2 MB pdfUpper Canning River catchment nutrient report 2017 update 1.16 MB pdfUpper Canning River catchment nutrient report 2018 update1.15 MB
Upper Swan pdfUpper Swan catchment nutrient report 2016 4.22 MB pdfUpper Swan catchment nutrient report 2017 update 969.42 KB pdfUpper Swan catchment nutrient report 2018 update969.87 KB
Yule Brook pdfYule Brook catchment nutrient report 2016 7.6 MB pdfYule Brook catchment nutrient report 2017 update 2.38 MB pdfYule Brook catchment nutrient report 2018 update1.65 MB