2024 Bathing Water Profile for St Mildred's Bay, Westgate
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The bathing water is a resort beach on the north Kent coast near to Margate. It is a gently shelving sandy beach with a promenade above the entire length and a tidal pool to the west. There are extensive underwater rock formations just offshore to the east and west which are exposed at low water.
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Thanet District
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Kent
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In 1999, the Environment Agency undertook tracer investigations of the Margate Long Sea Outfall. The conclusions were that the discharge had the potential to affect bathing water quality in certain environmental conditions. Sewage treatment has since been upgraded. In 1999 and 2000, a surface water discharge to the west of the EC site (Roxborough Road) was investigated. Results showed that the discharge can occasionally be contaminated during a wet weather. Further investigations up the surface water drain did not indicate any problems with foul sewer misconnections.
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Within the vicinity of the beach there is one surface water outfall (Roxborough Road). Reduced water quality may persist in the area adjacent to the outfall for some time after rainfall has occurred. There is also one storm overflow that discharges alongside a slipway (St.Mildred's Bay storm overflow). Discharges occur when heavy rainfall overwhelms the sewerage system but the overflows are designed to ensure that bathing water is protected. There are further storm overflows more than 1.5 km away to the east.
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In 1998 and 1999, St.Mildred's storm overflow was upgraded by Southern Water. This upgrade included increased storage capacity to reduce spill events and the installation of a tide flap. Prior to 2007, treated sewage was discharged from Margate long sea outfall 7 km from the bathing water. Since 2007, flows from Margate long sea outfall, together with flows from Broadstairs long sea outfall, have been transferred to Weatherlees sewage treatment works for further treatment and UV disinfection. The treated sewage is then discharged out of Margate long sea outfall.
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For the four year (2020-2023) assessment period where data is available, seaweed (macroalgae) was assessed as being sufficient to be objectionable for 19% of visits, with 82% of visits noting the presence of seaweed (macroalgae). The shore can become covered with seaweed, depending on tides and the weather. Groynes, rocks and other fixed objects may have a covering of seaweed which can be slippery.
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Modern sewerage systems have two separate systems, one takes foul sewage to sewage treatment, the other takes rainwater runoff through surface water drains to rivers, lakes and the sea. Misconnections occur when waste water pipes are plumbed into surface water drains instead of the foul water sewerage system. This can give rise to pollution when the waste water is discharged directly to the environment through the surface water drain. For example, a washing machine or toilet may be incorrectly plumbed so that it discharges to the surface drain rather than the foul sewage drain.
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For the four year (2020-2023) assessment period where data is available, phytoplankton (microscopic algae) was not assessed as being sufficient to be objectionable, but was observed as being present on 5% of visits. Phytoplankton (microscopic algae) increase in number at certain times of the year. This process is known as a phytoplankton bloom. Blooms of phytoplankton can result in the water appearing discoloured or a foam forming on the water. The risks to human health from contact, ingestion or inhalation with marine algae that currently occur in UK coastal waters are considered to be low. However, some individuals may be more sensitive and display some reactions. A common marine algae found in UK coastal waters is Phaeocystis, which is often mistaken for sewage as it forms foam and a brown scum, but it is non-toxic.
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There are no active pollution risk forecasts made at this bathing water. However any bathing water has the potential to be affected by a pollution incident and if this occurs a pollution risk warning with associated advice against bathing will be issued on this website.
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2024 Bathing Water Profile for St Mildred's Bay, Westgate
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2024-09-30
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2024-05-01
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There is a treated sewage treatment works discharge 7 km from the shore of this bathing water which is designed to protect bathing water quality.
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Environment Agency samplers make observations of litter present on the beach at every visit, this includes assessments of sewage debris, litter and tar. At St Mildred's Bay, Westgate for the four year (2020-2023) assessment period where data is available, sewage debris was not noted at this site. Litter was not assessed as being sufficient to be objectionable, but was observed as being present on 78% of visits. Tarry residue was not noted at this site.
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The bathing water is situated in a low lying area. The natural drainage (hydrological) catchment surrounding the bathing water is approximately 250 hectares. This comprises the local urban area and some of the wider surrounding area which is predominantly rural (arable).
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St Mildred's Bay, Westgate
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St Mildred's Bay, Westgate
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Sampling point at St Mildred's Bay, Westgate
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632687
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51.384887262981415
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1.342764656145183
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170396
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Sampling point at St Mildred's Bay, Westgate
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p152 dT23 h59 m59 s
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2024 05 01 t00:00:00
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2024-05-01T00:00:00
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2024 09 30 t23:59:59
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2024-09-30T23:59:59
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2024 12400:1
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Seaweed (macroalgae) and phytoplankton (microscopic algae) are a natural part of the marine and freshwater environment. Below we note whether these have been recorded in quantities sufficient to be a nuisance.
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The majority of sewers in England are “combined sewers” and carry both sewage and surface water from roofs and drains. A storm overflow operates during heavy rainfall when the sewerage system becomes overwhelmed by the amount of surface water. The overflow prevents sewage from backing up pipes and flooding properties and gardens. An emergency overflow will only operate infrequently, for example due to pump failure or blockage in the sewerage system.
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Heavy rain falling on pavements and roads often flows into surface water drains or highway drains, ending up in local rivers and ultimately the sea. The quality of bathing water may be adversely affected as a result of such events.
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It is the Environment Agency role to drive improvement of water quality at bathing waters that are at risk of failing higher standards. It is natural for water to run off the land to the sea. Water quality at a bathing water is dependent upon the type and area of land (the catchment) draining to the water and the activities undertaken in that catchment.
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Discharges from sewage treatment works have improved substantially in England since the 1980s.
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