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Direct Potable Reuse in Colorado:Regulatory Framework and the
PureWater Colorado Demonstration
Water Resources Review CommitteeJune 19, 2018 – Denver, Colorado
John Rehring, P.E.Carollo Engineers/
WateReuse Colorado
Ron Falco, P.E.CDPHE WQCD
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Some quick* definitions
Non-potable reuse (Reg. 84)
Indirect potable reuse (IPR)
Direct potable reuse (DPR)
WRFIrrigation / Commercial /
Industrial Users
WTFWRF
WRF
Surface Water orGroundwater Augmentation
AdvancedWTF
* DPR regulatory effortwill add specificity!
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Non-potablereuse
Somesurface
water IPR
No DPRprojects inplace orimminent
What’s the role of reuse in Colorado?
2050POPULATION
~2X
M&I SUPPLYGAP
560KAC-FT/ YEAR
“... potable reusewill be an
important facetof closing the...
gap”
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Why is interest in DPR growing in Colorado?
Year-roundsupply demand
Year-rounddemand distribution
No dualdistribution
Others have“gone first”
Increasingly cost-competitivevs. traditional supplies
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Two quotes help us put potable reuse incontext
It “rains” every dayat the wastewatertreatment plant!
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Water shouldbe judged byits quality –
not its history!
Two quotes help us put potable reuse incontext
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WateReuse Colorado Project proactivelysupports DPR implementation in Colorado
RegulatoryframeworkRegulatoryframework
Outreachtools andproducts
Outreachtools andproducts
Planningtools toassessDPR
options
Planningtools toassessDPR
options
DPR PROJECT OUTCOMES
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City of Aurora
Town of Castle Rock
Centennial
Colorado Springs Utilities
Denver Water
Consultants & NGOs
PCWRASMWSA
Water Industry Associations
Colorado Water Conservation BoardWater Supply Reserve Account Grant
WateReuse Colorado DPR project collaboratorsincluded leading utilities and organizations
CDPHE
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WateReuse DPR Project WorkgroupsTackled Regulatory and Outreach Topics
FourWorkgroupMeetings
NationalPerspectives& Experience
ColoradoPriorities
Colorado DPRRegulatoryFramework
Communicationsand Outreach Plan
Regulatory Development
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ALIGNMENT
Why develop DPR regulations?
DPRRegs
Confidence in public healthprotection
Certainty in planningfor Utilities / Water Providers
Public Acceptance
Water ProvidersCDPHE WQCDStakeholders
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When is the right time to develop DPRregulations?
Before aDPR
project isproposed
Concurrentwith a
project’sdesign
During orafter
startup of aproject
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Flexibility and adaptability throughColorado’s established reg structure
Fundamental,enforceablerequirements
Interprets theRegulation
Bestpractices
Fosters public confidence
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Water QualityControl
CommissionRulemaking
Reg / Policy /Guidance
Develop
Standards
DevelopTreatment andMonitoringStandards
DevelopImplementationPrograms
UnresolvedIssues:
Timeline
Early 2018:WateReuseColoradoReg / Policy /GuidanceFramework
Path from framework to regulation
Resources
Develop
Standards
DevelopTreatment andMonitoringStandards
CWCB grant and in-kind contributions
Independent Advisory Panel
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Future Efforts and Water QualityCommission Role
• Secure funding/resources for rulemaking andimplementation in 2019 or 202_?
– Staff (FTE)
– Expenses for operating and A.G. support ($)
– Database ($)
• Division-led stakeholder effort
• Division develops regulatory proposal
• Formal rulemaking to address DPR
• Flesh out the framework with completedpolicies and guidance
Outreach at thePureWater Colorado
Demonstration Project
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PureWater Colorado Demonstration Basics
Who
• WateReuse Colorado, Carollo Engineers, and Denver Water• Plus many project partners collaborating to make this happen!
What
• Purifying secondary treated wastewater to drinking waterstandards
When• January through mid-April 2018
Where• Hosted at Denver Water Recycling Plant
Why
• Provide physical context to DPR regulatory and public outreachwork and demonstrate the ability to purify recycled water
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PureWaterColoradoDemonstrationProcesses
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Tours Reached a Wide Audience
State legislators (WRRC/staff)
State agencies – CDPHE, CWCB
Chamber of Commerce
Water utility managers
Bureau of Reclamation
University students and faculty
AWWA and WateReuse Colorado
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The Project Received Broad Media Coverage
• Coverage on all majorDenver TV networks aswell as print/social media
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Ongoing Outreach from the PureWaterColorado project
Outreach Events and Scholarships
Materials Available for Future Outreach
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Takeaways
Significant progress in preparing Colorado toimplement DPR projects
Still some needs for regulatory development
Model of success – partnerships and collaborationbetween utilities, CDPHE, and engineering firms
Outreach, regulatory development, and publicconfidence are all interlinked
Direct Potable Reuse in Colorado:Regulatory Framework and the
PureWater Colorado Demonstration
Water Resources Review CommitteeJune 19, 2018 – Denver, Colorado
John Rehring, P.E.Carollo Engineers/
WateReuse Colorado
Ron Falco, P.E.CDPHE WQCD