India's cleanest city Indore has now been declared as the country's first 'water plus' city under the Swachh Survekshan 2021, Madhya Pradesh Chief Minister Shivraj Singh Chouhan said on Wednesday. As per an official, 30% of Indore's sewer water was recycled and reused. A water plus city certificate is provided to a city for maintaining cleanliness in rivers and drains.