Province Diet Temperature (◦C) pH DO (ppm) Transparency (cm) NH3(mgL−1) NO2
−(mgL−1)
An Giang TF 29.0–31.8 7.1–7.8 2.5–3.0 22–30 0.01–0.08 0.01–0.05
FF 29.0–31.8 7.0–7.5 3.0–4.5 20–25 0.01–0.02 0.01–0.03
Dong Thap TF 29.0–31.8 7.0–7.3 2.2–3.2 20–25 0.02–0.06 0.01–0.05
FF 28.7–31.5 7.0–7.5 3.5–4.5 18–22 0.01–0.02 0.01–0.02