As a result of combined stormwater and wastewater overflows, residents are advised to avoid entering the waters along the affected shorelines, as the wastewater may pose a health risk. (Keri Coles/News staff)

Heavy rains force sewage overflows on beaches across Greater Victoria

Precipitation infiltrated wastewater overflows in Saanich, Oak Bay, Victoria and Esquimalt

Thursday’s historically high rains discharged unexpected amounts of raw sewage to the shorelines of Greater Victoria.

Stormwater flows from Thursday’s 48 millimetres of precipitation infiltrated numerous wastewater overflows along the shorelines, particularly in Saanich, Oak Bay, Victoria and Esquimalt.

The region’s main trunk sewer system is not designed to handle 5 centimetres of rain in one day, which is about 10 per cent of Victoria’s anticipated annual rainfall of 58 cm per year (according to Victoria’s website).

The Capital Regional District and Island Health confirmed they’ll sample the beaches for enterococci levels above/below the 70CFU/100mL recreational limit, said Matthew McCrank, senior manager of infrastructure operations with the CRD.

RELATED: Two-day storm departs B.C., but leaves flooded roads, avalanche danger behind

Until the numbers are in (it will take a day or two) it’s best to keep dogs (and humans) out of the water along the beaches of Saanich’s Arbutus Cove, Finnerty Cove, Telegraph Cove and Cadboro Bay, Oak Bay’s McNeill Bay, Victoria’s Clover Point and Ross Bay, and Esquimalt’s Saxe Point, Macaulay Point and McLoughlin Point.

“We’ll post a sign in the affected areas if it remains above the 70CFU/100mL [threshold],” McCrank said.

Sewage overflows are nothing new in the region that still sends untreated waste into the Salish Sea, such as Saanich’s Arbutus Road area, where the smell of fresh rain is commonly replaced by the stench of sewer.

“Infiltration,” as it’s known, is a common problem around the region, not just in Saanich or Oak Bay. And it’s generally in certain areas, McCrank said.

RELATED: Torrential rains top 1936 record in Greater Victoria

So where does sewer infiltration come from?

It can be as easy as stormwater flooding over the four holes seen in manhole covers along the street surface. But mostly, it’s because municipalities such as Oak Bay’s Rutland pump station are overwhelmed by a system that’s not designed to anticipate heavy rain events.

Keep in mind, Vancouver’s annual rainfall is nearly three times greater than Victoria’s.

The other reason for infiltration is that the wastewater pipes are not all sealed, meaning there is various entrance points. Some municipalities continue to drain storm water through their wastewater system to this day, and based on the expected amount of rainfall in Victoria, it mostly works.

Greater Victoria’s new $765 million wastewater treatment system will actually minimize some of the common overflows though to what extent, McCrank can’t confirm.

Part of the deal will install a 5,000 metres-cubed attenuation tank along Arbutus Road, known as the Arbutus Attenuation area which currently overwhelms the sewage outflows in that area. Instead, the tank will release into the new wastewater system and flow to McLoughlin Point. Plans for the tank were made in a 2013 deal when Saanich secured 2.8 hectares of Haro Woods with the CRD.

Cadboro Bay is often hit during high rain events for multiple reasons as Rutland and Humber collect sewage only from Oak Bay but overflow with light to moderate rains.

reporter@saanichnews.com

Like us on Facebook and follow us on Twitter

Get local stories you won't find anywhere else right to your inbox.
Sign up here

Just Posted

Sooke fitness facilities reopen to the public

Extra measures set in place to ensure user safety

Organizer, Victoria councillor, VicPD talk about upcoming rally for Black lives

‘It’s a simple ask’: Peace rally for Black lives organizer asks people to listen

George Floyd mural appears on Victoria street

Victoria artist Paul Archer painted the mural outside his shop on Fort Street

PHOTOS: Dozens show up to rebuild vandalized Victoria people-less protest

Chalk messages of support surround the fountain in Centennial Square

Playgrounds back in the swing of things on the West Shore

Langford, View Royal, Colwood reopen parks, playgrounds

‘I’m pissed, I’m outraged’: Federal minister calls out police violence against Indigenous people

Indigenous Minister Marc Miller spoke on recent incidents, including fatal shooting of a B.C. woman

Facing changes together: Your community, your journalists

The COVID-19 pandemic has changed the world in ways that would have… Continue reading

Kelowna Mountie who punched suspect identified, condemned by sister

‘How did he get away with this? How is this justifiable?’

PHOTOS: Anti-racism protesters gather in communities across B.C.

More protests are expected through the weekend

Pair accused of ‘horrific’ assault at Vancouver’s Oppenheimer Park at large

Police say Jason Tapp, 30, and Nicole Edwards, 33, did not show up to meet their bail supervisor this week

No charges to be laid against 22 northern B.C. pipeline protesters

Twenty-two people were arrested in February, but Crown has decided not to pursue charges

Plan in place for BC Ferries to start increasing service levels

Ferry corporation reaches temporary service level agreement with province

B.C. starts to see employment return under COVID-19 rules

Jobless rate for young people still over 20% in May

Most Read