Welland Water Treatment Plant - 2023 Summary Report

This report summarizes the water flows for the Welland Water Treatment Plant, drinking water system number 220002048, from Jan. 1 to Dec. 31, 2023.

This report satisfies the requirements of Ontario Regulation 170/03 - Drinking Water Systems.

Inspection rating

The Welland Water Treatment Plant was granted a 100 per cent inspection rating during the 2022 - 2023 Ministry of Environment, Conservation and Parks annual drinking water system inspection.

Summary of non-compliance

The Welland Water Treatment Plant was operated in such a way that at no time did it fail to meet or exceed the requirements of the Safe Drinking Water Act, associated regulations, the system's approval or any order that may have been issued for this reporting period.

Summary of water treatment plant flows

The flow rates captured below are moments in time, and can be affected by various circumstances, such as pump changes or valve position. It is not unusual to have higher or lower than normal flows for this reason.

Month Total flow raw (ML) Total flow treated (ML) Average day raw (ML) Average day treated (ML) Minimum day treated (ML) Maximum day treated (ML) Minimum flow rate treated (ML/d) Maximum flow rate treated (ML/d) Total waste sludge (ML)
Jan. 721.880 699.495 23.286 22.597 20.850 24.646 45.312 58.523 28.918
Feb. 657.380 639.034 23.478 22.852 20.068 25.016 24.445 42.944 25.386
March 728.080 697.113 23.486 22.517 19.736 24.855 26.121 44.756 41.658
April 703.870 683.381 23.462 22.807 20.396 25.983 21.799 51.650 29.723
May 814.310 788.846 26.268 25.479 21.762 36.293 18.856 43.025 36.635
June 868.350 834.003 56.727 54.782 20.960 34.386 19.062 43.381 47.116
July 825.490 795.508 26.629 25.702 21.150 29.496 19.109 43.044 43.637
Aug. 790.180 760.829 25.490 24.582 22.698 26.325 22.256 46.882 42.018
Sept. 828.610 790.871 27.620 26.400 22.650 35.764 24.600 45.500 50.354
Oct. 753.320 727.195 24.301 23.490 18.906 32.900 22.576 46.131 35.318
Nov. 688.190 672.852 22.940 22.458 19.568 25.294 23.656 64.644 22.753
Dec. 719.060 696.210 23.195 22.485 19.324 25.512 21.331 42.825 34.078

The flow rates are moments in time, and can be affected by various circumstances, such as pump changes or valve position and therefore not unusual to have higher or lower than normal flows.

Flow totals

  • Total flow raw was 9,098.720 ML
  • Total flow treated was 8,785.338 ML
  • Total waste sludge was 437.594 ML

Minimums

  • Minimum day treated was 18.906 ML
  • Minimum flow rate treated was 18.856 ML
  • Total waste sludge minimum was 22.753 ML

Maximums

  • Maximum day treated was 36.293 ML
  • Maximum flow rate treated was 64.644 ML
  • Total waste sludge maximum was 437.594 ML

Averages

  • Total average day raw was 27.240 ML
  • Total average day treated was 26.346 ML
  • Total waste sludge average was 36.466 ML

Comparison of actual to system approved flow

Flow rates are required by Municipal Drinking Water Licence number 007-104.

Maximum daily flow: 65.000 ML
Maximum flow rate: 65.000 ML/day

Month Average day treated (ML) Per cent of average day treated rated capacity Maximum day treated (ML) Per cent of maximum day treated rated capacity Maximum flow rate treated (ML/d) Per cent of maximum flow rate rated capacity
Jan. 22.597 34.7% 24.646 37.9% 45.312 69.7%
Feb. 22.852 35.1% 25.016 38.4% 42.944 66.0%
March 22.517 36.1% 24.855 38.2% 44.756 68.8%
April 22.807 35.0% 25.983 39.9% 51.650 79.4%
May 25.479 39.1% 36.293 55.8% 43.025 66.1%
June 27.838 84.2% 34.386 52.9% 43.381 66.7%
July 25.702 39.5% 29.496 45.3% 43.044 66.2%
Aug. 24.582 37.8% 26.325 40.5% 46.882 72.1%
Sept. 26.400 40.6% 35.764 55.0% 45.500 70.0%
Oct. 23.490 36.1% 32.900 50.6% 46.131 70.9%
Nov. 22.458 34.3% 25.294 38.9% 44.644 68.6%
Dec. 22.485 34.5% 25.512 39.2% 42.825 65.8%
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