Public Water Authority
Onslow Water and Sewer Authority (ONWASA)
Serving Onslow County and surrounding service areas
Population served
156,755 people (EPA SDWIS active CWS PWS NC0467035)
State system code
FIPS 37
Billing frequency
A dedicated this detail was not publicly posted. The reviewed ONWASA pages do not state a universal residential billing frequency.
Provider briefing
How this utility’s billing works
Onslow Water and Sewer Authority (ONWASA) operates as a public water authority serving Onslow County and surrounding service areas. Customers should use the provider’s current account-specific bill and official customer-service instructions as the final authority for deadlines, balances, and service requests.
The published water-rate framework is described as A dedicated this detail was not publicly posted. For the full 2026 residential table in the reviewed page text. ONWASA publishes current rate and fee schedules and FY26/FY27 budget materials separately.. Bills are generated a dedicated this detail was not publicly posted. the reviewed onwasa pages do not state a universal residential billing frequency., and a typical residential cost reference is A dedicated this detail was not publicly posted. The reviewed ONWASA pages do not expose enough complete current base and volumetric rates for a defensible 5,000-7,000 gallon estimate.. These descriptions are useful planning benchmarks; actual charges can change with meter size, usage, sewer averaging, local taxes, drought stages, or account-specific fees.
Wastewater and sewer calculation
ONWASA’s leak policy states that no adjustment is available for sewer services billed at a flat rate for third-party billing. The reviewed pages do not expose the complete ordinary sewer formula or winter-average method.
Meter and infrastructure notes
ONWASA states that approximately 90% of area residential meters are located at or near the front sidewalk and explains both conventional flow indicators and new Automatic Meter Reader (AMR) meters. The site also links AMI FAQs, but the reviewed pages do not establish a universal read interval or full AMI deployment schedule.
Emergency water support
Report a leak or water emergency
910-455-0722 is ONWASA’s 24-hour emergency line. Customers should follow the prompts for leaks and service-related issues.
Official starting point
Choose the right next step
Reading this profile
A practical reference for Onslow County and surrounding service areas
Onslow Water and Sewer Authority (ONWASA) is listed here as a public water authority. The profile separates account actions—such as paying a bill or requesting service—from explanatory material about rates, meters, wastewater, leaks, and delinquency.
Because utility rules can vary by account class, meter size, service address, billing date, and local ordinance, treat the published bill and current provider website as the final authority. Use this profile to locate the correct channel and prepare better questions for customer service.
If your issue is urgent, start with the provider’s emergency number or official payment route rather than waiting for an email response. Keep a written record of calls, confirmation numbers, notice dates, and documents you submit.