Charles County, MD Water Use Rules: Recycled Water Rules (2026)
Key Facts
- Governing section
- Charles County Code § 291-56
- System-wide effluent capacity
- 20 MGD
- Mattawoman WWTP nonpeak discharge
- 10.8 MGD (Oct-Mar)
- Firm user deposit
- 2 years' purchase cost, due in 60 days
- Non-firm user deposit
- 1 year's purchase cost, due in 60 days
- O&M surcharge on usage fee
- 25% of estimated O&M cost
- Termination notice for nonpayment
- 30 days' notice
Summary
Charles County controls reuse of treated wastewater from the Mattawoman WWTP under a formal reclaimed-effluent allocation policy. Industrial and outdoor users must sign a purchase agreement with the County Commissioners, pay a deposit, and accept priority tiers: guaranteed "firm" service or interruptible "non-firm" service, split by a set bulk-allocation percentage table.
The Charles County public effluent system is serviced by several small treatment plants and one large treatment plant, which has a total capacity of 20 MGD. In concurrence with water conservation provisions, utilizing reclaimed effluent for industrial and/or outdoor use is allowed in accordance with the following policy. ... The Mattawoman WWTP currently discharges 10.8 MGD of reclaimed effluent during the nonpeak season (October-March)... the available reclaimed effluent supply to be allocated is 1.5 MGD (total design capacity less the average usage). Of the 1.5 MGD available to allocate, only 0.3 MGD will be for "firm" users
Full Breakdown
8 MGD of reclaimed effluent during the nonpeak season (October-March). Before any industrial or outdoor user can draw reclaimed effluent, a purchase agreement between the County Commissioners and the purchaser must be signed, unless bulk allocation requirements under § 291-56B(4) already apply. 33% non-firm). Applicants file an allocation application detailing intended use and estimated demand; the County must notify the applicant of its decision within 15 days. On tentative approval, a non-firm applicant has 60 days to deposit one year's worth of reclaimed effluent purchase costs, while a firm applicant must deposit two years' worth in that same 60-day window; a final allocation is granted once the deposit clears.
The monthly usage fee combines a per-1,000-gallon purchase charge, which the County updates annually in its Fees and Charges Schedule, with a 25% surcharge for operation and maintenance costs.
Violations & Fines
Under § 291-56B(5)(a), if an owner fails to pay the required user and O&M fees specified in § 291-56B(7), the County may terminate reclaimed effluent service after giving 30 days' written notice. A user who requests termination in writing within two years of starting service gets the deposit refunded; termination after two years forfeits the deposit. The County also may cut off or restrict non-firm service at any time to protect firm users' priority.
Frequently Asked Questions
Who can buy reclaimed effluent from Charles County?
How long does Charles County take to approve a reclaimed effluent request?
What happens if I stop paying my reclaimed water bill in Charles County?
Is reclaimed effluent service guaranteed once I'm connected?
Sources & Official References
Other rules in Charles County
Compare Charles County to another location·View the Maryland water use rules overview
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