He nui te pānga o te nui rawa o te hiahia mō te hāora matū (COD) i roto i te wai ki te hauora o te tangata me te taiao. He tohu matua te COD mō te ine i te kukū o ngā poke waro i roto i ngā pūnaha wai. Ko te nui o te COD e tohu ana i te kino o te poke waro, e tūpono ana ki ngā pūnaha rauropi me te hauora o te marea.

Ka taea e ngā matū paitini e uru ana ki ngā wai te whara i ngā rauropi wai, tae atu ki ngā ika, ā, ka kohia pea mā roto i te mekameka kai, ka uru atu ki te tinana tangata, ka arahi atu ki te paihana mau tonu. Hei tauira, ko te roa o te whakamahinga o ngā matū pēnei i te DDT kua honoa ki ngā pānga kino ki te pūnaha io, te kino o te ate, te ngoikore o te tinana, me ngā raruraru pea ki ngā pūnaha uri me ngā pūnaha ira, tae atu ki te pikinga ake o ngā mōrearea o ngā āhuatanga whānau me te mate pukupuku.

Ka pā kino hoki ngā taumata COD teitei ki te kounga o te wai, ā, ka whakararuraru hoki i te taurite o te taiao. Ina uru ngā poke rauropi ki ngā awa me ngā roto me te kore e rongoatia i te wā tika, ka mimiti te nuinga ki roto i ngā paru o raro. I roto i te wā, ka pā kino ēnei matū kua kohia ki ngā mea ora i roto i te wai mō te wā roa. E rua ngā huarahi matua e kitea ai tēnei: ​​tuatahi, ka mate pea ngā momo ika i roto i te wai, ka whakararu i te pūnaha rauropi, ā, ka hinga pea ngā nohoanga katoa o te wai; tuarua, ka piki haere te kohi paitini i roto i ngā rauropi pērā i te ika me te mātaitai. Ko te kai a te tangata i ngā kai moana kua poke ka hua ake te whakawhiti me te kohikohi o ēnei matū kino ki roto i te tinana, ka puta he mōrearea nui ki te hauora mō te wā roa, tae atu ki te mate pukupuku, ngā hapa whanaketanga, me ngā whakarerekētanga ira.

Heoi anō, ko ngā taumata COD tino tiketike ka whakararu i te kaha tūturu o ngā wai ki te pure i a ia anō. Ka pau te hāora rewa (DO) i te pirau o ngā mea rauropi, ā, ina nui ake te hāora e pau ana i te tere o te reo-hāora, ka heke pea ngā taumata DO ki te kore, ka hua ake he āhua anaerobic. I raro i ēnei āhuatanga, ka mau tonu te mahi a ngā moroiti anaerobic, ka puta he hau hauwai sulfide, ka pouri te wai, ka puta hoki he kakara kino—he tohu noa ēnei o te parahanga kino.

He mea nui te whakamahinga o ngā tātaritanga COD ki te aroturuki me te aukati i ngā taumata COD nui rawa. He whānuitia te whakamahinga o te tātaritanga Boqu'COD ki te aromatawai i te wai mata, te wai whenua, te paru o te whare, me te paru o ngā ahumahi. E tautoko ana i ngā whakamātautau ohorere tere i te papaanga me te tātaritanga kounga wai tika i roto i te taiwhanga, ā, he taputapu maha-whakamahinga mō te aroturukitanga taiao me te whakahaere parahanga.