Wastewater treatment plants are large non-linear systems subject to large perturbations in wastewater flow rate, load and composition. Nevertheless these plants have to be operated continuously, meeting stricter and stricter regulations. Many control strategies have been proposed in the literature for improved and more efficient operation of wastewater treatment plants. Unfortunately, their evaluation and comparison – either practical or based on simulation – is difficult. This is partly due to the variability of the influent, to the complexity of the biological and biochemical phenomena and to the large range of time constants (from a few minutes to several days). The lack of standard evaluation criteria is also a tremendous disadvantage. To really enhance the acceptance of innovative control strategies, such an evaluation needs to be based on a rigorous methodology including a simulation model, plant layout, controllers, sensors, performance criteria and test procedures, i.e. a complete benchmarking protocol. This book is a Scientific and Technical Report produced by the IWA Task Group on Benchmarking of Control Strategies for Wastewater Treatment Plants. The goal of the Task Group includes developing models and simulation tools that encompass the most typical unit processes within a wastewater treatment system (primary treatment, activated sludge, sludge treatment, etc.), as well as tools that will enable the evaluation of long-term control strategies and monitoring tasks (i.e. automatic detection of sensor and process faults). Work on these extensions has been carried out by the Task Group during the past five years, and the main results are summarized in Benchmarking of Control Strategies for Wastewater Treatment Plants. Besides a description of the final version of the already well-known Benchmark Simulation Model no. 1 (BSM1), the book includes the Benchmark Simulation Model no. 1 Long-Term (BSM1_LT) – with focus on benchmarking of process monitoring tasks – and the plant-wide Benchmark Simulation Model no. 2 (BSM2). Authors: Krist V. Gernaey, Technical University of Denmark, Lyngby, Denmark, Ulf Jeppsson, Lund University, Sweden, Peter A. Vanrolleghem, Université Laval, Quebec, Canada and John B. Copp, Primodal Inc., Hamilton, Ontario, Canada

With this update to the 2005 publication "Benchmarking Indicators for Water and Wastewater Utilities: Survey Data and Analyses Report," utility managers can determine where their utility performance resides within the industry peer group.

Aggregate benchmarking data provides one framework for an individual utility to track its goals and improvement. Use of benchmarking data, or initiating the process of performance measurement, can be key to performance improvement. Efficient and effective improvements are necessary for utilities to meet customer expectations, manage rates, and meet more stringent regulations. AWWA's Utility Benchmarking publication allows utility managers to use data and analyses to determine how their utility's performance compares to the water or wastewater industry. The report includes performance indicators for five areas of operations: Organizational Development, Customer Relations, Business Operations, Water Operations, and Wastewater Operations. Metrics you can use Water and wastewater utility managers need useful metrics to gauge how their organization is currently performing, and to set reasonable targets for future performance. The benchmarking data and analyses in this report are chosen for their usefulness in helping utilities track and improve both operational efficiency and managerial effectiveness. Benchmarks for all operations Utility Managers can use the data and analyses in this report to determine how their utility's performance compares to the water or wastewater industry in five area of operations: Organizational Development, Customer Relations, Business Operations, Water Operations, and Wastewater Operations. The report provides benchmarking data for 58 key performance indicators. Compare your utility Aggregate data are provided from 38 US states, two Canadian provinces, American Samoa, and Puerto Rico. Participating utilities range in size from under 10,000 population served to over 500,000 population served, summarizing performance data for the fiscal year 2020. Where data are available, historical trends from previous AWWA utility benchmarking surveys are also provided.

Aggregate benchmarking data provides one framework for an individual utility to track its goals and improvement. Use of benchmarking data, or initiating the process of performance measurement, can be key to performance improvement. Efficient and effective improvements are necessary for utilities to meet customer expectations, manage rates, and meet more stringent regulations. AWWA's Utility Benchmarking publication allows utility managers to use data and analyses to determine how their utility's performance compares to the water or wastewater industry. The report includes performance indicators for five areas of operations: Organizational Development, Customer Relations, Business Operations, Water Operations, and Wastewater Operations. Metrics You Can Use: Water and wastewater utility managers need useful metrics to gauge how their organization is currently performing, and to set reasonable targets for future performance. The benchmarking data and analyses in this report are chosen for their usefulness in helping utilities track and improve both operational efficiency and managerial effectiveness. Benchmarks for All Operations: Utility Managers can use the data and analyses in this report to determine how their utility's performance compares to the water or wastewater industry in five area of operations: Organizational Development, Customer Relations, Business Operations, Water Operations, and Wastewater Operations. The report provides benchmarking data for 58 key performance indicators. Compare Your Utility: Aggregate data are provided from 38 US states, two Canadian provinces, American Samoa, and Puerto Rico. Participating utilities range in size from under 10,000 population served to over 500,000 population served, summarizing performance data for the fiscal year 2021. Where data are available, historical trends from previous AWWA utility benchmarking surveys are also provided.

Aggregate benchmarking data provides one framework for an individual utility to track its goals and improvement. Use of benchmarking data, or initiating the process of performance measurement, can be key to performance improvement. Efficient and effective improvements are necessary for utilities to meet customer expectations, manage rates, and meet more stringent regulations. AWWA's Utility Benchmarking publication allows utility managers to use data and analyses to determine how their utility's performance compares to the water or wastewater industry. The report includes performance indicators for five areas of operations: Organizational Development, Customer Relations, Business Operations, Water Operations, and Wastewater Operations. Metrics you can use Water and wastewater utility managers need useful metrics to gauge how their organization is currently performing, and to set reasonable targets for future performance. The benchmarking data and analyses in this report are chosen for their usefulness in helping utilities track and improve both operational efficiency and managerial effectiveness. Benchmarks for all operations Utility Managers can use the data and analyses in this report to determine how their utility's performance compares to the water or wastewater industry in five area of operations: Organizational Development, Customer Relations, Business Operations, Water Operations, and Wastewater Operations. The report provides benchmarking data for 58 key performance indicators. Compare your utility Aggregate data are provided from 38 US states, two Canadian provinces, American Samoa, and Puerto Rico. Participating utilities range in size from under 10,000 population served to over 500,000 population served, summarizing performance data for the fiscal year 2018. Where data are available, historical trends from previous AWWA utility benchmarking surveys are also provided.