Grahamstown Water Treatment Plant (Hunter Water)
Testing started once a month in Raw West Main from January 4 2016, and increased to once a week in mid 2017.
Testing started once a month in Raw Water East Main from May 2018.
Testing started weekly in Clearwater Tank from March 2018.
Grahamstown Water Treatment Plant – PFOS
PFOS Detections (Australian Guideline Level 0.07ug/L
March 2017: Grahamstown Water Treatment Plant 0.006ug/L
June 2017: Grahamstown Water Treatment Plant 0.004ug/L
July 2017: Grahamstown Water Treatment Plant 0.004ug/L
September 2017: Grahamstown Water Treatment Plant 0.008ug/L
October 2017: Grahamstown Water Treatment Plant 0.005ug/L
November 2017: Grahamstown Water Treatment Plant 0.003ug/L
December 2017: Grahamstown Water Treatment Plant 0.004ug/L
January 2018: Grahamstown Water Treatment Plant 0.002ug/L
Source: Hunter Water Monthly Water Quality Reports
Grahamstown Clearwater Tank (CWT)
April 2 2018: (CWT) PFOS 0.002ug/L
September 10 2018: (CWT) PFOS 0.002ug/L
December 3 2018: (CWT) PFOS 0.003ug/L
February 19 2019: (CWT) PFOS 0.005ug/L
September 9 2019: (CWT) PFHxS 0.002ug/L
September 16 2019: (CWT) PFHxS 0.002ug/L
October 28 2019: (CWT) PFHxS 0.004ug/L
January 6 2020: (CWT) PFOS 0.002ug/L, PFHxS 0.002ug/L
January 13 2020: (CWT) PFHxS 0.002ug/L
January 20 2020: (CWT) PFOS 0.002ug/L, PFHxS 0.003ug/L.
February 17 2020; (CWT) PFHxS 0.002ug/L
June 1 2020: (CWT) PFHxS 0.002ug/L
July 13 2020: (CWT) PFOS 0.003ug/L
August 17 2020: (CWT) PFOS 0.002ug/L
March 16 2021: (CWT) PFOS 0.003ug/L
April 12 2021: (CWT) PFOS 0.002ug/L
April 19 2022: (CWT) PFOS 0.002ug/L, PFHxS 0.002ug/L
August 1 2022: (CWT) PFHxS 0.003ug/L
August 23 2022: (CWT) PFOS 0.002ug/L, PFHxS 0.003ug/L
September 6 2022: (CWT) PFHxS 0.004ug/L
March 6 2023: (CWT) PFOS 0.004ug/L
March 13 2023: (CWT) PFOS 0.002ug/L, PFHxS 0.002ug/L
March 20 2023: (CWT) PFHxS 0.002ug/L