St Austell Bay Boat Club - Members Launching Facility in St Austell

Water Quality & Storm Overflows

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Water Quality & Storm Overflows

St Austell Bay is surrounded by beautiful coastal waters and several designated bathing beaches. Keeping informed about local water quality is essential for all members, whether launching boats, kayaking or enjoying a swim. This page brings together bathing water quality data from the Environment Agency for beaches from Fowey and Lostwithiel round through Polkerris and Par Sands to Mevagissey and Gorran Haven, alongside storm overflow activity from South West Water.

Bathing water quality can be affected by weather events, seasonal rainfall and localised land runoff. Annual classifications cover the May to September bathing season, while daily pollution risk forecasts and storm overflow status update far more often. We encourage all members and visitors to check these regularly before taking to the water.


Loading water quality & storm overflow data . . .

Fowey to Mevagissey — Bathing Water Quality
(Source: Environment Agency & Defra)

Bathing Water Quality

Beach
Latest Annual Rating
Latest Results
Alerts
Lostwithiel, River Fowey
Not classified
Mon 21st Sep 2026
★★☆☆
E.coli 260 · IE 210 cfu/100ml
— Swimfo
Readymoney Cove, Fowey
Good
(2025)
Mon 21st Sep 2026
★★★★
E.coli <10 · IE <10 cfu/100ml
Rain affected Rain affected Swimfo
Polkerris
Excellent
(2025)
Thu 17th Sep 2026
★★★★
E.coli 18 · IE <10 cfu/100ml
Rain affected Rain affected Swimfo
Par Sands
Good
(2025)
Mon 21st Sep 2026
★★★★
E.coli 18 · IE <10 cfu/100ml
Rain affected Rain affected Swimfo
Shorthorn (Central Carlyon Bay)
Excellent
(2025)
Thu 17th Sep 2026
★★★★
E.coli <10 · IE <10 cfu/100ml
Rain affected Rain affected Swimfo
Crinnis (East Carlyon Bay)
Excellent
(2025)
Thu 17th Sep 2026
★★★★
E.coli <10 · IE <10 cfu/100ml
Rain affected Rain affected Swimfo
Charlestown
Excellent
(2025)
Thu 17th Sep 2026
★★★★
E.coli <10 · IE <10 cfu/100ml
— Swimfo
Duporth
Excellent
(2025)
Thu 17th Sep 2026
★★★★
E.coli 36 · IE <10 cfu/100ml
— Swimfo
Porthpean
Excellent
(2025)
Mon 21st Sep 2026
★★★★
E.coli <10 · IE <10 cfu/100ml
Rain affected Rain affected Swimfo
Pentewan
Excellent
(2025)
Mon 21st Sep 2026
★★★★
E.coli 100 · IE 45 cfu/100ml
— Swimfo
Polstreath, Mevagissey
Excellent
(2025)
Mon 21st Sep 2026
★★★★
E.coli <10 · IE <10 cfu/100ml
— Swimfo
Portmellon
Excellent
(2025)
Mon 21st Sep 2026
★★★★
E.coli <10 · IE <10 cfu/100ml
Rain affected Rain affected Swimfo
Gorran Haven
Excellent
(2025)
Mon 21st Sep 2026
★★★★
E.coli <10 · IE <10 cfu/100ml
Rain affected Rain affected Swimfo

Water quality classifications are assessed annually (May–September bathing season) by the Environment Agency under the Bathing Water Regulations 2013. Data provided under the Open Government Licence v3.0.

Updated 3 hours ago



St Austell Bay & Mevagissey — Storm Overflows
(Source: South West Water)

Storm Overflows

Location
Watercourse
Status
Latest Event
Bodinnick Ferry Slip, Fowey
Fowey Estuary (E)
Discharging
Since Tue 29th Sep 2026 @ 10:09 pm
(9hr 12min so far)
Gorran Churchtown
Portmellon Stream(S)
No discharge
Wed 30th Sep 2026 @ 12:47 am – 1:14 am
(27min)
Gorran Haven
Atlantic Ocean (C)
No discharge
Wed 30th Sep 2026 @ 2:23 am – 3:03 am
(40min)
Portmellon
Stream (S)
No discharge
Tue 4th Nov 2025 @ 12:33 pm – 12:34 pm
(1min)
Mevagissey
Mevagissey Bay
No discharge
Sun 30th Aug 2026 @ 2:45 pm – 3:04 pm
(19min)
St Ewe
Caerhays Stream
No discharge
Thu 21st May 2026 @ 1:15 pm – 1:17 pm
(1min)
Nansladron, Pentewan Valley
Tributary Of White River
No discharge
Wed 30th Sep 2026 @ 3:26 am – 3:31 am
(4min)
Pentewan (Sconhoe)
St Austell River (S)
No discharge
Sat 20th Dec 2025 @ 6:38 pm – 6:46 pm
(8min)
St Mewan
Polgooth Stream
No discharge
Thu 21st May 2026 @ 10:48 am – 10:51 am
(2min)
Pentewan Valley (upper)
St Austell River(S)
No discharge
Fri 15th May 2026 @ 10:24 am – 10:25 am
(1min)
Pentewan Valley, Tregorrick (lower)
St Austell River
No discharge
Tue 29th Sep 2026 @ 10:48 pm – 3:45 am
(4hr 56min)
Higher Porthpean
St Austell Bay (C)
No discharge
Thu 23rd Oct 2025 @ 8:41 am – 8:42 am
(1min)
Winsford, near Charlestown
Winsford Stream
No discharge
Fri 1st May 2026 @ 10:15 am – 10:18 am
(2min)
Charlestown / Higher Porthpean
St Austell Bay (C)
No discharge
Wed 30th Sep 2026 @ 1:02 am – 1:55 am
(52min)
Boscoppa Stream, St Austell
Sandy River
No discharge
Tue 29th Sep 2026 @ 10:08 pm – 10:33 pm
(24min)
Spit Point, Par
(C) St Austell Bay
No discharge
Sun 1st Feb 2026 @ 4:16 am – 4:35 am
(19min)
St Blazey Stream, Par
St Blazey Stream
No discharge
Fri 8th May 2026 @ 11:24 am – 11:25 am
(1min)
Par Harbour (River Par)
River Par
No discharge
Tue 19th May 2026 @ 2:54 pm – 3:49 pm
(55min)
Polkerris
St Austell Bay (C)
No discharge
Sun 30th Aug 2026 @ 2:53 pm – 3:12 pm
(19min)
Readymoney Cove, Fowey
River Fowey Estuary(E)
No discharge
Thu 23rd Apr 2026 @ 9:18 am – 9:20 am
(1min)
Ready Money Corner, Fowey
River Fowey Estuary(E)
No discharge
Sun 30th Aug 2026 @ 2:51 pm – 3:30 pm
(38min)
Polruan
River Fowey Estuary(E)
No discharge
Mon 27th Apr 2026 @ 12:22 pm – 12:24 pm
(2min)
Esplanade, Fowey
River Fowey Estuary(E)
No discharge
Sun 30th Aug 2026 @ 2:56 pm – 3:11 pm
(15min)
Town Quay, Fowey
River Fowey Estuary (E)
No discharge
Tue 29th Sep 2026 @ 7:39 pm – 11:37 pm
(3hr 57min)
Passage Street, Fowey
River Fowey Estuary(E)
No discharge
Tue 29th Sep 2026 @ 6:58 pm – 10:19 pm
(3hr 21min)
Bodinnick / Polruan
River Fowey Estuary
No discharge
Sun 30th Aug 2026 @ 3:00 pm – 3:18 pm
(17min)
Golant, River Fowey (upper estuary)
River Fowey Estuary (E)
No discharge
Wed 30th Sep 2026 @ 1:57 am – 1:58 am
(1min)

Data from South West Water's National Storm Overflow Hub, refreshed every ~10 minutes.

Updated 3 mins ago
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