Skip to main content
CityRuleLookup

Charles County, MD Water Use Rules: Recycled Water Rules (2026)

Significant Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified August 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.

These county ordinances apply to unincorporated areas of Charles County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

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?
Industrial and outdoor users can apply to purchase reclaimed effluent from the Mattawoman Wastewater Treatment Plant under § 291-56. Applicants must sign a purchase agreement with the County Commissioners, specify whether they need guaranteed "firm" or interruptible "non-firm" service, and file an application detailing the intended use and estimated demand.
How long does Charles County take to approve a reclaimed effluent request?
The County must notify every applicant of its decision within 15 days of receiving a completed allocation application, per § 291-56B(4)(c). Approval also depends on overall and bulk reclaimed-effluent capacity availability and the intended use's likely impact on County systems.
What happens if I stop paying my reclaimed water bill in Charles County?
The County can terminate service if you fail to pay the user and operation-and-maintenance fees required under § 291-56B(7), but it must give 30 days' written notice first under § 291-56B(5)(a). Deposits are refundable only if you request termination in writing within two years of starting service.
Is reclaimed effluent service guaranteed once I'm connected?
Only for "firm" users. Non-firm users accept interruptible service under § 291-56B(2), meaning the County can cut back or suspend their supply when firm-user demand or system capacity requires it, since firm purchasers hold contractual priority over the reclaimed effluent.

Sources & Official References

Other rules in Charles County

All Charles County rules

Compare Charles County to another location·View the Maryland water use rules overview

Get notified when Recycled Water Rules in Charles County, MD changes

We'll email you the moment we detect a change in the code. No spam, unsubscribe anytime.

We'll never sell or share your email. One-click unsubscribe in every email.

See something wrong?

Help us keep this page accurate. If you notice an error or outdated information, let us know.