Swansea Council general enquiries
01792 636000The council's main switchboard, answered during office hours. Ask for the relevant service — the environment or nature team for invasive plants on council land.
Council phone and email contacts
Council contacts
Reach the right office about invasive plants
Swansea Council phone lines, email and online reporting routes for invasive weeds, together with the Natural Resources Wales line for watercourses — nothing invented, just the council's own published contacts.
Independent guide: this website is not Swansea Council. Every number, email and link below comes from the council's and Natural Resources Wales' own pages and was checked on 1 October 2026. There is no dedicated invasive-plant hotline in Swansea — the closest official routes are listed here.
Phone
Numbers that answer
Environment call centre
01792 635600The council's environment call centre handles street, park and environmental problems — a good first call for knotweed or other invasive growth in public places.
Council phone and email contactsNatural Resources Wales incident line
0300 065 3000A 24-hour line for environmental incidents across Wales — pollution, damage to watercourses and river problems, including invasive growth along the Tawe, Clyne and Loughor.
NRW report an incidentFor out-of-hours emergencies, the council lists separate emergency contacts on the same phone-and-email page. Keep knotweed out of emergency calls — it is urgent only when it is on a road edge, damaging a structure or spreading into a watercourse.
Email & online
Write or report online
Report a problem online
Swansea Council's report-it pages cover street and environmental issues. Give the exact location and photographs of any invasive plant on public land.
swansea.gov.uk/reportitRequest a knotweed treatment quote
For knotweed on land you own or are responsible for, the council's treatment team quotes free after a site visit, and replies within 10 working days.
swansea.gov.uk/getknotweedtreatedEmail the council
If you cannot find a direct address for the service you need, the council publishes one general email for every other enquiry.
contact@swansea.gov.ukReport a sighting
Send an invasive plant report
Seen knotweed, balsam, hogweed or another invasive plant in Swansea? Fill this in and it is saved straight to this guide's report log. For council land, please also use the official report-it route above — this form does not replace it.
Which one?
Who to contact for what
Knotweed on council land, streets, parks or back lanes
Report it to the council — the nature team handles invasive plants on council land. Note the exact spot, photograph it and never cut, pull or dig the stand while you wait.
Use the report-it pagesKnotweed on your own land
The council's treatment service quotes privately owned land, or you can compare specialist contractors. Either way, get the method, visits and guarantee in writing first.
Open the council quote formGrowth beside a river, stream or drain
Natural Resources Wales is responsible for pollution and environmental damage on watercourses, and its incident line is answered 24 hours a day.
Report to NRWIn person and by post
Contact centre
The Civic Centre, Oystermouth Road, Swansea SA1 3SN
Postal address
City and County of Swansea, The Guildhall, Swansea SA1 4PE
Check current opening hours on the council website before travelling, and bring photographs of the plant rather than cutting or carrying any part of it.
Before you call or write
Record it first. Dated photos, an exact location and nearby landmarks make any report usable — and the council cannot identify a plant from a phone call.
Leave the plant alone. Cutting, strimming or digging knotweed and other invasive plants can spread fragments and weaken your own position.
Know whose land it is. Council land is the council's matter; private land belongs to the owner. The boundary decides who you contact, not how bad it looks.