1.1. Good status of water and pressures affecting it

Good status of water

A number of criteria are used by governments and agencies around the world to assess the quality, quantity and hydrological regime of water resources with the purpose to protect both human health and the environment.

In the European Union, the good status of surface waters and groundwater are commonly defined in the Water Framework Directive [Ref 9]. For surface water (rivers, lakes, marine waters), ecological status and chemical status are important in assessing whether the overall status is good. For groundwater, chemical status and quantitative status must both be at least good to ensure that the overall good status would be achieved.

Figure 5. Assessment of status of surface waters and groundwater according to the WFD

Source: European Environment Agency

The Water Framework Directive will be covered in the next module (2.4).

Pressures affecting the good status of water

When talking about problems related to water, we need to understand the pressures that affect the good status of water. 

Pressures can originate from point or diffuse sources. Point sources of pollution are single and identifiable. Point sources that place pressure on surface water are usually plants or farms. When contaminated water seeps from the point source into groundwater, leakage is usually the reason. Diffuse pollution originates from a range of dispersed urban and rural activities. An example of diffuse pollution is the penetration of nutrients into water bodies or groundwater as a result of over-fertilisation of fields.

Figure 6. Point and diffuse sources of water pollution [Ref 2]

Water can also be abstracted either from surface or groundwater, thus creating pressure on the quantity of water resources.

Water flow regulation and morphological alteration causes pressure on surface water, e.g. creating dams on rivers prevents migration of fish.

Artificial recharge of groundwater (injecting water into the ground in a controlled way)  is a pressure that may originate from mining activities or other major industries.

Saltwater intrusion into groundwater typically occurs due to the pumping of freshwater from wells close to the sea. Therefore, drinking water aquifers become contaminated by salt water.

Table 1. Pressures affecting the good status of water

SOURCE CLASSIFICATION	EXAMPLES OF SOURCES
DIFFUSE SOURCES
urban drainage (including runoff)	industrial/commercial estates urban areas (including sewer networks) airports trunk roads railway tracks and facilities harbours
agriculture diffuse	arable, improved grassland, mixed farming crops with intensive nutrient or pesticide usage or long bare-soil periods (e.g. corn, potato, sugar beets, vine, hops, fruits, vegetables) over grazing – leading to erosion horticulture, including greenhouses application of agricultural waste (esp. manure) to land
forestry	peat mining planting/ground preparation felling pesticide applications fertilizer applications drainage oil pollution
other diffuse	sewage sludge recycling on land atmospheric deposition dredge spoil disposal into surface waters shipping/navigation
POINT SOURCES
wastewater	municipal wastewater, primarily domestic municipal wastewater with a major industrial component storm water and emergency overflows private wastewater, primarily domestic private wastewater with a major industrial component harbours
industry	gas/petrol chemicals (organic and inorganic) pulp, paper and boards woollens/textiles iron and steel food processing brewing/distilling electronics and other chlorinated solvent users wood yards/timber treatment construction power generation leather tanning shipyards other manufacturing processes
mining	active deep mine active open cast coal site/quarry gas and oil exploration and production peat extraction abandoned coal (and other) mines abandoned coal (and other) mine spoil heaps (bings) tailings dams
contaminated land	old landfill sites urban industrial sites (organic and inorganic) rural sites military sites
agriculture point	slurry silage and other feeds sheep dip use and disposal manure depots farm chemicals agricultural fuel oils agricultural industries
waste management	operating landfill sites operating waste transfer stations, scrap yards, etc. application of non-agricultural waste to land
aquaculture	land-based fish farming / watercress / aquaculture marine cage fish farming
manufacture, use and emissions from all industrial/agricultural sectors	priority substances all industrial/agricultural sectors’ priority hazardous substances other relevant substances
ABSTRACTION
reduction in flow	abstractions for agriculture abstractions for potable supply abstractions by industry abstractions by fish farms abstractions by hydro-energy abstractions by quarries/open cast coal sites abstractions for navigation (e.g. supplying canals)
ARTIFICIAL RECHARGE
	groundwater recharge
MORPHOLOGICAL
flow regulation	hydroelectric dams water supply reservoirs flood defence dams diversions weirs
river management	physical alteration of a channel engineering activities agricultural enhancement fisheries enhancement land infrastructure (road/bridge construction) dredging
transitional and coastal management	estuarine/coastal dredging marine constructions, shipyards and harbours land reclamation and polders coastal sand renewal (safety)
other morphological	barriers

Based on the Common Implementation Strategy for the Water Framework Directive (2000/60/EC). Guidance Document No. 3, Table 4.2, pg 53 cited at: https://circabc.europa.eu/sd/a/7e01a7e0-9ccb-4f3d-8cec-aeef1335c2f7/Guidance%20No%203%20-%20pressures%20and%20impacts%20-%20IMPRESS%20(WG%202.1).pdf

The effect of pressures varies on different water bodies. The table 2 below provides some examples about the effects of different pressures on water bodies.

Table 2. Analysis of Pressures and Impacts. Pressures to be considered

Pressure	Water Body Category
	Rivers	Lakes	Coastal/Transitional	Groundwater
Household	X	X	X	X
Industry (operating, historical)	X	X	X	X
Agriculture	X	X	X	X
Forestry	X	X	X	X
Mines, quarries	X			X
Transport	X		X
Flow regulation works	X		X
Hydropower works	X		X
Urban settlements	X	X	X
Flood protection	X		X
Fishing/angling	X	X	X

Based on the Common Implementation Strategy for the Water Framework Directive (2000/60/EC). Guidance Document No. 3, Table 4.1, pg 53 cited at: https://circabc.europa.eu/sd/a/7e01a7e0-9ccb-4f3d-8cec-aeef1335c2f7/Guidance%20No%203%20-%20pressures%20and%20impacts%20-%20IMPRESS%20(WG%202.1).pdf

 THINKING EXERCISE

What are three major pressures related to water in your country? 

Mark all activities that have an impact on surface water: