Notice and timing
How delinquency is handled
Grace period after the due date
A dedicated this detail was not publicly posted. The reviewed public Napa billing pages do not state one universal numeric grace period.
Late-fee calculation
A dedicated this detail was not publicly posted. The current fee schedule page identifies delinquency-related charges but the reviewed source did not expose a universal late percentage or fixed late charge.
Disconnection timeline
California SB 998 applies residential shutoff protections. The current fee schedule lists a $50 fee for failure to pay a delinquent water bill by noon on the turn-off date; the complete notice timeline is governed by the city's discontinuation policy and account notice.