According to data published by the Karnataka State Pollution Control Board, water quality analysis conducted across 147 monitoring locations between April and November 2025 shows that not a single lake in the city consistently met potable or safe bathing standards. No Lake Achieves Safe Water Quality The report categorised lakes under standard water quality classes: Class A: Potable without treatment Class B: Safe for bathing Class D & E: Severely polluted, unsuitable for human use Shockingly, no lake achieved Class A or Class B status during the monitoring period. Most lakes were classified under D or E, indicating heavy contamination. Iconic Lakes Among Worst Affected Several of Bengaluru's most well-known lakes recorded disturbing pollution levels: Bellandur Lake: Rated E in April, briefly improved to D during summer, before slipping back to E by November. Varthur Lake: Fluctuated between D and E categories. Hebbal Lake: Maintained D status for most months before ...