This is the second time that the company, which provides environmental services to the construction industry, has been successfully prosecuted by Severn Trent Water.
Martin Kane, chief engineer for Severn Trent Water, says that, even after the legal notice was served on Arrow, the firm was been found to have committed further offences of discharging effluent above the legal limits.
"We're really disappointed to have had to prosecute Arrow Environmental Services once again," states Kane.
"We're even more disappointed that this is not the end of the story and that we're now considering further prosecutions based on yet more failures from them," he continues.
"For a company that advertise themselves as having 'a fresh approach to environmental issues', with a 'state-of-the-art plant' which has 'helped to minimise their environmental impact', we'd expect better."
Kane also wonders at the fact that Arrow prides itself on working for public service sector organisations and local government, as well as some of the UK's best known brand names.
"Our customers pay for damage to the sewer network and the treatment works, so it's important that we prosecute offenders in appropriate cases and take action to recover costs where possible," he says.
"The limits we set to regulate trade discharges are calculated to make sure they don't adversely affect the ability of our sewage works to efficiently treat sewage. So exceeding this consent is not only illegal, it can also damage the sewage treatment process and so risk causing harm to the environment."
The case against Arrow Environmental Services Limited was heard yesterday (Tuesday 19 May 2015) at Wolverhampton Crown Court, following a prosecution brought by Severn Trent Water for a breach of the Water Industry Act 1991.
The case was referred to the Crown Court as the maximum fine that could be imposed by the Magistrate's Court was deemed to be insufficient when the case was heard there earlier this month.
It is a criminal offence under section 121 of the Act to discharge trade effluent into the public sewerage network in breach of the consent set out by the sewerage undertaker.