Municipal Stormwater Discharge Criteria -
Metro Vancouver & Fraser Valley
Last Updated: March 2, 2023
City of Abbotsford
Turbidity: < 25 NTU during normal weather conditions (< 25 mm of rain in the 24 hours prior), or < 100 NTU during significant rainfall events (≥ 25 mm of rain in the 24 hours prior).
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: where a Significant Rainfall Event has occurred within the preceding 24 hours
Stream and Drainage System Protection Bylaw
No. 4403, 2013
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
Erosion & Sediment Control Bylaw No. 4381 - 2006
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 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 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.
District of North Vancouver
TSS: < 25 mg/L during May - September or
< 75 mg/L during October - April
City of Port Moody
pH: 6.5 - 8.0
TSS: < 75 mg/L above background
Stream and Drainage System Protection Bylaw No. 2470 - 2001
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
Additional Information:
B.C. Ministry of Environment Water Quality Standards: Approved BCWQGs
