viết cho tôi bài IELTS 150 từ

This table provides a comprehensive overview of the contrasting water pricing models and average household costs across five major Australian cities. The data clearly shows a wide variation in both consumption charges and the resulting annual expenditure for residents.

Melbourne reports the lowest average annual bill at $253, noticeably lower than the other four cities, which all fall within a tighter range between $310 and $332. Perth holds the highest average bill at $332.

The analysis of the tiered pricing reveals key differences in how cities manage high consumption. Sydney and Melbourne employ a flat rate structure, where the cost per kiloliter remains constant before and after the 125 KL threshold ($0.98/KL and $0.78/KL, respectively). Conversely, Perth and Adelaide utilize highly aggressive stepped pricing to strongly disincentivize heavy water usage. Perth features the most dramatic increase, jumping from the lowest initial rate of $0.42/KL to a punitive $1.50/KL for usage exceeding 125 KL. Adelaide similarly doubles its rate from $0.42/KL to 1.00/KL. This steep escalation in the high-usage tier is a major factor driving Perth's position as the city with the highest average household water bill, despite sharing the lowest initial charge with Adelaide.