Water Treatment

What is reclaimed water?

Water Reclamation and Reuse

Regulation Water resulting from the treatment of

domestic, municipal or industrial

(9 VAC 25-740)

**- ********** **** ** ******** for a water reuse

that would not otherwise occur.

DRWA

What is water reuse?

Beneficial Reuse of Treated

Wastewater & Stormwater in The use of reclaimed water for a direct

Delaware beneficial use, an indirect potable reuse, or

a controlled use in accordance with the

November 18, 2009

regulation.

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Principle

Principle factors driving water Water reclamation and reuse

reclamation and reuse in the U.S.

is voluntary not mandatory

and Virginia

If you choose to do it, you

Rapid growth rate in urban areas

must comply with the Water

must comply with the Water

Alternative to effluent point source

Reclamation

Reclamation and Reuse

discharges

Regulation unless excluded

(EPA Guidelines for Water Reuse, 2004)

by 9VAC25-740-50

9VAC25-740-

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Exclusions of Water Reclamation

Water Reclamation and Reuse

and Reuse Regulation

Regulation

Activities permitted by VDH

Utilization of gray water

Part I - Definitions and General Non-potable water produced and utilized by the same

Non-

Program Requirements treatment works (other qualifying factors)

Recycle flows within treatment works

Part II - Reclaimed Water Standards, Industrial effluents or other water streams prior to final

treatment used in re-circulation, recycle or reuse systems

re-

Monitoring Requirements and at the same industrial facility (other qualifying factors)

Reuses Land treatment systems described by SCAT Regulations

Indirect reuse excluding indirect potable reuse projects

Part III - Application and Technical after 10/1/08

Existing indirect potable reuse projects as of 10/1/08

Requirements

Direct injection of reclaimed water into an aquifer

authorized by UIC permit issued by EPA

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Prohibitions of Water Reclamation

Standards for Reclaimed Water

and Reuse Regulation

For the reclamation of municipal

Direct potable reuse

wastewater

Reuse inside a residential/domestic dwelling or a building

containing residential/domestic units

Level 1 - suitable for public

Reuse to fill residential swimming pools, hot tubs or

wading pools

di contact

Reuse for food preparation or incorporation as an

Level 2 - not suitable for public

ingredient into food or beverage for human consumption

contact

Bypasses of untreated or partially treated wastewater

from the reclamation system or intermediate unit process

to the point of reuse (with some exceptions)

For the reclamation of industrial

Return of reclaimed water to the reclaimed water

wastewater determined on a

distribution system after delivery to an end user

case-by-

case-by-case basis

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Standards for Reclaimed Water

Parameter

Level 1 Level 2

Reuse Categories and Minimum

Secondary treatment with filtration Secondary treatment with standard

Description of minimum treatment

and higher level disinfection disinfection

Standard Requirements

Monthly geometric mean 49 colonies/100 ml; CAT > 800

colonies/100 ml colonies/100 ml

Monthly geometric mean 35 colonies/100 ml; CAT > 235

1. Urban - Unrestricted Access (Level 1)

colonies/100 ml colonies/100 ml

Monthly geometric mean 24 colonies/100 ml; CAT > 104

2. Irrigation - Unrestricted Access (Level 1)

colonies/100 ml colonies/100 ml

CAT 5 NTU

Monthly average

Non-

irrigated

irrigated vegetation

BNR

Irrigation reuse vs. land treatment

Bulk irrigation reuse reuse of reclaimed water for

Irrigation reuse - strictly reuse irrigation of an area > 5 acres on one contiguous

Land treatment - primarily treatment and property

disposal, secondarily planned or unplanned

Non-

Non-bulk irrigation reuse reuse of reclaimed water

reuse (Sewage Collection and Treatment

for irrigation of an individual area

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