长春水费是指居民每个月需要支付的用水费用。水费的计算是根据每家每户的实际用水量来决定的，其中，每吨水的价格也是一个重要因素。那么，2017年长春市的水费究竟是多少钱一吨呢？

首先，我们需要知道长春的水费计价方式。根据长春市自来水公司的规定，每月用水量在30吨以下的居民家庭，水费按照分层计价模式进行收费。具体来说，前10吨水的单价较低，接下来的10吨水的单价适中，再接下来的10吨水的单价较高。这样的计价方式可以鼓励居民节约用水，减少浪费。

在2017年，长春市的水费标准如下：前10吨水的单价为2.3元/吨，中间10吨水的单价为3元/吨，超过20吨的水的单价为4.8元/吨。这意味着如果一个家庭在一个月内用水量不超过30吨，那么他们需要支付的水费将根据不同阶梯单价来计算。

举个例子来说明。假设某个家庭在一个月内的用水量为15吨，那么他们需要支付的水费计算方式如下：前10吨的水费=10吨×2.3元/吨=23元，剩余的5吨水费=5吨×3元/吨=15元。所以总共需要支付的水费为23元+15元=38元。

当然，以上只是一个示例，实际上每个家庭的用水情况都不尽相同，因此他们的水费也会有所不同。如果用水量超过30吨，超出部分的水费将按照4.8元/吨的单价计算。另外，对于一些特殊情况，如商业用水或者大型工业企业用水，水费的计价方式可能会有所不同。

总体来说，长春市水费多少钱一吨在2017年取决于每个家庭的实际用水量和用水情况。根据不同的用水量范围，水费将按照不同的阶梯单价进行计算。这种计价方式鼓励居民节约用水，保护水资源。

In English:

The water fee in Changchun refers to the amount residents need to pay for their monthly water consumption. The calculation of the water fee is based on the actual water consumption of each household, and the price per ton of water is an important factor. So how much did the water cost per ton in Changchun in 2017?

Firstly, we need to understand the pricing method of water fees in Changchun. According to the regulations of Changchun Water Supply Company, residential households with a monthly water consumption of less than 30 tons are charged based on a tiered pricing model. Specifically, the first 10 tons of water have a lower unit price, the next 10 tons have a moderate unit price, and any excess above 20 tons has a higher unit price. This pricing method encourages residents to conserve water and reduce wastage.

In 2017, the water fee standard in Changchun was as follows: The unit price for the first 10 tons of water was 2.3 yuan per ton, the unit price for the next 10 tons was 3 yuan per ton, and the unit price for any water consumption exceeding 20 tons was 4.8 yuan per ton. This means that if a household's water consumption does not exceed 30 tons in a month, their water fee will be calculated based on the different tiered prices.

Let's take an example to illustrate. Suppose a household has a water consumption of 15 tons in a month, then their water fee calculation would be as follows: Water fee for the first 10 tons = 10 tons × 2.3 yuan/ton = 23 yuan, remaining 5 tons of water fee = 5 tons × 3 yuan/ton = 15 yuan. Therefore, the total water fee they need to pay is 23 yuan + 15 yuan = 38 yuan.

Of course, the above is just an example, and in reality, each household has different water consumption, so their water fees will vary. If the water consumption exceeds 30 tons, the excess water fee will be calculated at a unit price of 4.8 yuan per ton. Additionally, for special cases such as commercial or large industrial water usage, the pricing method for water fees may differ.

Overall, the cost of water per ton in Changchun in 2017 depends on each household's actual water consumption and usage. Based on different ranges of water consumption, the water fee is calculated using different tiered prices. This pricing method encourages residents to conserve water and protect water resources.