回复：谢谢老猫！！我找Wisconsin。

個人會建議您

(A)仔細讀一下這個資料
http://wis-law.com/tenantduties.html

(B)依據您所在州的法律"landlord has 21 days after you move out to either return your deposit or tell you in writing why she/he is keeping all or part of your deposit"

然而有一個"例外" (除了上述規定之外,您還需要做的)

MADISON WISCONSIN ONLY If your security deposit was more than half of a month's rent, your landlord must pay simple interest from the time you pay the deposit until the time you move out (MGO 32.07(3)). The interest rate changes every year


所以您可以以書面在規定的時間之內通知對方您為什麼要扣住對方的押金,(對方欠租與為繳納的水費應該是最好的理由,只是水費怎麼會那麼高??????

ALSO 這個資料應該對您有用

When can a landlord refuse to return a security deposit?

The landlord has a right to withhold a security deposit for any of several reasons, such as if the tenant:

•damaged the premises beyond ordinary wear and tear;
•caused waste or neglect of the premises (such as leaving hot water running in the bathtub for days);
•didn’t pay rent;
•didn’t pay for utility services, whether the landlord provided these or the tenant paid the utility companies directly; or
•didn’t pay mobile home parking fees that the local government assessed against the tenant.
The landlord must give reasons in writing for refusing to return all or part of the security deposit. State law requires the landlord to provide this information within 21 days of the tenant vacating. The tenant must give the landlord his or her new address.

資料來源:

http://www.wi*****ar.org/AM/Template.cfm?Section=Consumer_Resources&Template=/CM/ContentDisplay.cfm&ContentId=92179

在此同時如果已經過了21天,您應該以書面通知對方親自與您聯絡來處理押金與賠償的事宜,同時您可以就您所有的損失,在當地小額法庭提出訴訟.