Water pollution

rain that is unusually acidic

contamination of water bodies

thumb|313x313px|Eutrophication can cause harmful algal blooms like this one in a river near Chengdu, China.

scientific study of the chemical and biochemical phenomena that occur in natural places

thumb|upright=1.3|Micro plastics of diverse shapes in sediments from four rivers in ‌white arrowheads indicate aluminium, glass and sand (white bars represent 1mm for scale) thumb|upright=1.3|Photodegraded plastic straw. A light touch breaks larger straw into microplastics.

flow of excess rainwater not infiltrating in the ground over its surface

process of treating sewerage before release into the environment or water reuse

publicly available water supplied to homes

Trichloroethylene (TCE, IUPAC name: trichloroethene) is an organochloride with the formula C2HCl3, commonly used as an industrial degreaser. It is a clear, colourless, non-flammable, volatile liquid with a sweet chloroform-like pleasant mild smell and burning sweet taste. Trichloroethylene has been sold under a variety of trade names. Under the trade names Trimar and Trilene, it was used as a volatile anesthetic and as an inhaled obstetrical analgesic. Industrial abbreviations include trichlor, Trike, Tricky and tri. It should not be confused with the similar 1,1,1-trichloroethane, which was c

chemical, physical, biological, and radiological characteristics of water

thumb|Caddisfly (order Trichoptera), a [[macroinvertebrate used as an indicator of water quality.]] A bioindicator is any species (an indicator species) or group of species whose function, population, or status can reveal the qualitative status of the environment. The most common indicator species are animals. For example, copepods and other small water crustaceans that are present in many water bodies can be monitored for changes (biochemical, physiological, or behavioural) that may indicate a problem within their ecosystem. Bioindicators can tell us about the cumulative effects of different

human-created waste that has deliberately or accidentally been released in a lake, sea, ocean or waterway

thumb|Turbidity standards of 5, 50, and 500 NTU

degradation of water quality by any process that changes ambient water temperature

thumb|Left: greywater sample from an office building. Right: Same greywater after treatment in membrane bioreactor

river in West Java, Indonesia

type of pollution caused by agriculture

fishing net left or lost in the sea, tangled on a reef or drifting in the open, potentially entangling animals

method of heat removal from components and industrial equipment

converting wastewater into an effluent for return to the water cycle

waste product from the production of alumina

measurement in environmental chemistry

environmental pollution by plastics

Sewage (or domestic sewage, domestic wastewater, municipal wastewater) is a type of wastewater that is produced by a community of people. It is typically transported through a sewer system. Sewage consists of wastewater discharged from residences and from commercial, institutional and public facilities that exist in the locality. Sub-types of sewage are greywater (from sinks, bathtubs, showers, dishwashers, and clothes washers) and blackwater (the water used to flush toilets, combined with the human waste that it flushes away). Sewage also contains soaps and detergents. Food waste may be prese

A bioassay is an analytical method to determine the potency or effect of a substance by its effect on living animals or plants (in vivo), or on living cells or tissues (in vitro). A bioassay can be either quantal or quantitative, direct or indirect. If the measured response is binary, the assay is quantal; if not, it is quantitative.

sustainable and resilient infrastructure

sewer that carries household waste water but not stormwater

28,800 plastic bath toys

waste produced by industrial activity or manufacturing processes

low-oxygen areas in oceans and large lakes caused by nutrient and fertilizer pollution

searching outdoor waters for ferromagnetic objects using a magnet tied to a rope

water color in different conditions

stagnation of water

wastewater from toilets

Xenoestrogens are a type of xenohormone that imitates estrogen. They can be either synthetic or natural chemical compounds. Synthetic xenoestrogens include some widely used industrial compounds, such as PCBs, BPA, and phthalates, which have estrogenic effects on a living organism even though they differ chemically from the estrogenic substances produced internally by the endocrine system of any organism. Natural xenoestrogens include phytoestrogens which are plant-derived xenoestrogens. Because the primary route of exposure to these compounds is by consumption of phytoestrogenic plants, they a

ferrobacteria known by a particular common name

approved environmental solutions

waste that is made from harmful chemicals

municipality in Akershus, Norway

surface runoff of rainwater created by urbanization

mechanisms and processes used to treat waters that have been contaminated by industrial or commercial activities

small dam

concentration of organic carbon in a sample

theory and measures to control erosion

Specific kinds of property lost or abandoned at sea

type of subsurface wastewater disposal facility

contamination of water by excessive inputs of nutrients

pollution resulting from multiple sources

bloom of algae that causes harm to the nearby ecosystem

farm management agenda for controlling pollution from surface runoff in agriculture chemicals in fertiliser, pesticides, animal slurry, crop residues or irrigation water.

localized die-off of fish populations

thumb|upright=1.25|Siltation of a waterway Siltation is water pollution caused by particulate terrestrial clastic material, with a particle size dominated by silt or clay. It refers both to the increased concentration of suspended sediments and to the increased accumulation (temporary or permanent) of fine sediments on bottoms where they are undesirable. Siltation is most often caused by soil erosion or sediment spill.

Retrofitting is the addition of new technology or features to older systems. Retrofits can happen for a number of reasons, for example with big capital expenditures like naval vessels, military equipment or manufacturing plants, businesses or governments may retrofit in order to reduce the need to replace a system entirely. Other retrofits may be due to changing codes or requirements, such as seismic retrofit which are designed strengthening older buildings in order to make them earthquake resistant.

November 1986 environmental disaster in Switzerland

metric for the quality of an ecosystem

Land use and runoff management technique

low tract of land

diffusion of pesticides into the environment

thumb|right|Wastewater is considered effluent as it is released to surface water. Effluent is wastewater from sewers or industrial outfalls that flows directly into surface waters, either untreated or after being treated at a facility. The term has slightly different meanings in certain contexts, and may contain various pollutants depending on the source.

man-made body of water, formed to cool heated water or to supply cooling water