Municipal Stormwater Discharge Criteria -
Metro Vancouver & Fraser Valley
Last Updated: March 22, 2024
City of Abbotsford
Turbidity: < 25 NTU or < 100 NTU during and for 24 hours following a Significant Rainfall Event (> 25 mm within 24 hours)
City of Burnaby
pH: 6.5 - 8.5
Turbidity: < 50 NTU
Temperature: <18 °C.
City of Coquitlam
pH: 6.5 - 8.0
Turbidity: < 25 NTU or < 100 NTU during and for 24 hours following a Significant Rainfall Event (> 25 mm within 24 hours)
City of Maple Ridge
pH: 6.0 - 9.0
TSS: < 25 mg/L during dry weather operation and < 75 mg/L during the "wet season"
Turbidity: < 20 NTU
A bylaw to protect watercourses in Maple Ridge Bylaw No. 6410 - 2006
City of North Vancouver
pH: 6.5 - 8.0
Turbidity: < 25 NTU, or < 100 NTU, during and for 24 hours following a Significant Rainfall Event (> 25 mm in 24 hours)
Temperature: < 2 °C increase.
City of New Westminster
pH: < 6.5 - 9.0
TSS: < 75 mg/L
Turbidity: ≤ 65 NTU
A Guide to Erosion & Sediment Control
Erosion and Sediment Control Bylaw 7754, 2016
City of Port Moody
pH: 6.5 - 8.0
Turbidity: < 25 NTU, or < 75 NTU during and for 24 hours following a Significant Rainfall Event (> 25 mm within 24 hours or > 10 mm within 1 hour)
TSS: < 25 mg/L, or < 75 mg/L during and for 24 hours following a Significant Rainfall Event (> 25 mm within 24 hours or > 10 mm within 1 hour)
Temperature: < 16 °C during May - September (dry season) and < 12 °C during October - April (wet season)
City of Surrey
TSS: < 75 mg/L
Turbidity: 60 NTU trigger value (sampling will be submitted for laboratory analysis of TSS).
City of Vancouver
pH: 6.0 - 9.0
TSS: < 75 mg/L
NTU: 45 NTU trigger value (sampling will be submitted for laboratory analysis of TSS).
City of West Vancouver
pH: pH of receiving waters cannot be affected by more than 3.0 units above or below background
TSS: < 25 mg/L above background during May - September or < 75 mg/L above background during October - April
Watercourse Protection Bylaw No. 4364 - 2005
District of North Vancouver
TSS: < 25 mg/L during May - September or
< 75 mg/L during October - April
Township of Langley
Turbidity: < 25 NTU, or < 100 NTU, within 24 hours of a Significant Rainfall Event, or as indicated by current Fisheries and Oceans standards
Additional Information:
B.C. Ministry of Environment Water Quality Standards: Approved BCWQGs
