Explanatory Notes on Major Statistical Indicators


Annual Volume of Water Supplyrefers to the total volume of water supplied by the public water-works and those owned by individual enterprises and institutions during the whole year, including both the effective water supply and loss during the water supply.

Percentage of Urban Population with Access to Tap Waterrefers to the ratio of urban non-agricultural population (excluding temporary and mobile population) with access to tap water to the total urban non-agricultural population. The formula is:

Percentage of Population with Access to Tap Water=( Urban Non-agricultural Population with Access to Tap Water ÷ Urban Non-agricultural Population) 100%

Public Green Arearefers to green areas of various parks, zoos, botanical gardens, cemeteries, amusement parks, tree-flanked boulevards, green-land squares for tourism and relaxation. Area with trees planted along-side the streets and boulevards are excluded.

Total Discharge of Sewageincludes production sewage and domestic sewage. Production sewage refers to the total discharge by the enterprises and institutions in their production and scientific research. Domestic sewage refers to the discharge by urban and rural residential communities and the residential neighborhoods of the enterprise/institutions staff.

Volume of Industrial Waste Water Dischargedrefers to the volume of industrial waste water discharged, through all outlets, to the outside of industrial enterprises, including waste water produced, direct cooling water, underground water from mines that does not meet the standard of discharge, and the domestic sewage mixed up with industrial waste water when discharged, but excluding discharged indirect-cooling water.

Volume of Waste Gas Emissionrefers to waste gas emitted from burning of fuels and from production process in the area of the factory, and is measured by 10000 standard cubic metres each year under normal condition.

Industrial Dust Dischargedrefers to the total weight of solid dust discharged by industrial enterprises in the production process, such as dust of refractory materials from iron plants, dust from coke-screening system or from sintering machines of coking plants, dust from lime kilns, cement dust from building material enterprises, etc. but excluding smoke and dust discharged by power plants.

Volume of Industrial Solid Wastes Producedrefers to the total volume of solid, semisolid or high concentration liquid residue produced by industrial enterprises in their production process, including dangerous wastes, residues from melting, slag, powdered coal ash, gangue, chemical residues, tailings, radioactive residues and other residues, but excluding stripped or dug stones in mining (except gangue and acid or alkali stones which are stones washed or soaked by water with a pH value smaller than 4 or larger than 10.5.)

Social Welfare Institutionsrefer to institutions taking care of old people without children, handicapped people and orphans. They include social welfare institutions run by civil affairs departments, children's welfare institutions social welfare institutions for mental patients, and collectiveowned old people's homes in tualareas.