Brown algae sweeping through Boston’s Haven River has lead to concerns there has been a sewage spillage.
Visitors to the town contacted The Standard about the dirty-looking brown film covering the river surface and said they had reported their concerns to the council.
However, a spokesman for the Environment Agency has confirmed it is brown algae.
They said: “Algae tends to bloom or form scum during hot, dry weather in still conditions, so it is more common at this time of year and tends to clear when conditions change. If there is excessive growth it can be a danger to fish, but doesn’t look that severe in this case.”
To report concerns about water pollution or other issues, such as fish gasping for breath, contact the Environment Agency’s 24-hour hotline on 0800 807060.