"The sea water quality data collected under Coastal Ocean Monitoring and Prediction System (COMPAS) programme being implemented by Earth Science System Organisation-Integrated Coastal Marine Area Management (ESSO-ICMAM), indicate that there are no high level of pollution in coastal waters of India, except at few tier one (Mumbai, Kolkata and Chennai) and tier 2 cities (Mangalore, Kochi, Puducherry, Visakhapatnam).
"In some occasions, where high pathogenic bacteria load was observed was largerly due to untreated sewage discharge. Further nutrient loads, sporadic algal blooms were observed occasionally," Harsh Vardhan, Minister of Earth Sciences said in a written response to a question in Rajya Sabha.