Public Water Authority
Mount Pleasant Waterworks
Serving Mount Pleasant and portions of Charleston County
Population served
Approximately 91,500 people in the Mount Pleasant Waterworks Community Water System queue
State system code
FIPS 45
Billing frequency
Monthly billing. Mount Pleasant Waterworks calculates residential water and wastewater charges by monthly Residential Equivalent Unit (REU) allowances.
Provider briefing
How this utility’s billing works
Mount Pleasant Waterworks operates as a public water authority serving Mount Pleasant and portions of Charleston County. 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 FY2026 monthly fixed basic-facilities charge plus increasing-block volumetric rates. One residential REU includes 9,200 gallons per month; regular water is $6.34 per 1,000 gallons through the first 9,200 gallons, $12.68 for 18,401-27,600 gallons, and $19.02 above 27,600 gallons.. Bills are generated monthly billing. mount pleasant waterworks calculates residential water and wastewater charges by monthly residential equivalent unit (reu) allowances., and a typical residential cost reference is For one in-town residential REU using 7,000 gallons, the FY2026 estimate is approximately $58.23 per month for water plus $87.07 for wastewater, or $145.30 combined before taxes or other services: water BFC $13.85 + 7,000 gallons at $6.34, and wastewater BFC $28.20 + 7,000 gallons at $8.41.. 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
In-town wastewater is billed from water-meter consumption by REU. FY2026 residential wastewater has a $28.20 monthly BFC and $8.41 per 1,000 gallons for the first 9,200 gallons/REU, with excessive-use tiers above that level. Unmetered wastewater is charged a separate $65.53 monthly fee.
Meter and infrastructure notes
MPW bills by monthly REU and volumetric consumption, but the reviewed 2026 material does not identify a universal AMI/AMR platform, transmission interval, or detailed route schedule. Customers should request usage history or meter-test information when a bill appears abnormal.
Emergency water support
Report a leak or water emergency
843-884-9626, the published MPW customer-service/payment number. The reviewed 2026 pages do not expose a separate water-break emergency number; use the main line and follow the emergency prompt.
Official starting point
Choose the right next step
Reading this profile
A practical reference for Mount Pleasant and portions of Charleston County
Mount Pleasant Waterworks 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.