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Browse all solutions109 permitting domains across 14 regulatory categories.→12 domainsFederal Environmental ReviewNEPA and agency-specific environmental review workflows across all federal programs.→8 domainsSite Assessment & RemediationEnvironmental site assessments, contamination investigations, and regulatory cleanup frameworks.→9 domainsWater & WetlandsClean Water Act permits, wetland jurisdictional determinations, and water quality programs.→9 domainsSpecies & EcosystemsEndangered species consultation, take permits, biological assessments, and habitat conservation.→7 domainsAir Quality & ClimateClean Air Act permits, GHG accounting, noise analysis, and climate disclosure frameworks.→9 domainsEnergy & InfrastructureFERC licensing, renewable energy siting, pipeline safety, and nuclear facility review.→9 domainsCoastal & MaritimeCoastal zone management, offshore permitting, marine sanctuary protection, and maritime safety.→7 domainsCultural Resources & TribalNHPA Section 106 consultation, tribal government engagement, and historic preservation compliance.→9 domainsHazardous Materials & WasteRCRA permitting, CERCLA cleanup, hazardous waste compliance, and chemical risk management.→9 domainsLand Use & ConservationFederal land permits, conservation programs, and statutory use protections for parks and historic resources.→7 domainsAgriculture & ForestryUSDA conservation compliance, timber management, grazing permits, and invasive species programs.→4 domainsDrinking Water & Public HealthSafe Drinking Water Act compliance, underground injection, source water protection, and environmental justice.→5 domainsState Environmental ReviewState-level environmental review statutes including CEQA, SEPA, and state EIR equivalents.→5 domainsReporting & DisclosureClimate and ESG financial disclosure, GHG reporting, TRI, and sustainability frameworks.→
Resources
All guidesNEPA, ESA, administrative records, AI governance, and permitting workflow.→PolicyWhat the FY2026 NEPA Reform Means for Permitting TeamsRecent legislative changes to NEPA timelines and categorical exclusion authority change how agencies and consulting firms structure review processes.→ComplianceFive Common Mistakes in Section 7 ESA Consultation DocumentationSection 7 consultations are consistently among the most litigated parts of federal permitting. These documentation gaps create avoidable risk.→GuidanceHow to Build an Administrative Record That Holds Up in CourtWhen a NEPA decision is challenged, the judge reviews the administrative record—not the narrative. Disorganized or post-hoc records lose cases even when the underlying analysis was sound.→AI & GovernanceUsing AI in Federal Environmental Review: A Governance FrameworkAs AI enters environmental review workflows, agencies need governance that preserves defensibility while allowing speed gains.→ComplianceASTM E1527-21: What Changed and Why It MattersThe 2021 update introduced meaningful changes to recognized environmental condition definitions. Here is what practitioners need to know.→GuidanceCATEX Documentation: What Agencies Actually Need in the RecordCategorical exclusions are common, but poor documentation is a leading cause of successful legal challenges.→
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About OPEFMission, principles, and the team behind the platform.→How we fit inWhere OPEF sits in your permitting and compliance workflow.→PartnersIntegrations with compliance platforms and data providers.→CareersFull-time roles, hiring updates, and how we work as a team.→Environmental Professional NetworkFind permitting projects and connect qualified environmental reviewers.→ContactRequest a demo or ask a question about your program.→
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CATEGORY03
All solutions

03 · 14 categories

Water & Wetlands

Clean Water Act permits, wetland jurisdictional determinations, and water quality programs.

3 workflowsEPA / USACE / State

Program area

EPA / USACE / State

Hydrology and wetland programs9 declared domains

3 workflows

Domain templates, agency controls, and export paths within water & wetlands.

On this page

01Section 40402Section 40103NPDES

Related categories

01Federal Environmental Review
Federal Environmental Review02Site Assessment & RemediationSite Assessment & Remediation03Species & EcosystemsSpecies & Ecosystems04Air Quality & ClimateAir Quality & Climate05Energy & InfrastructureEnergy & Infrastructure
WorkflowAgencyCapabilities
01Section 404 / Clean Water Act workflow

Section 404 / Clean Water Act

U.S. Army Corps of Engineers

USACE / EPA

Individual and nationwide permit applications for discharge of dredged or fill material into waters of the U.S.

  • Jurisdictional determination documentation
  • Nationwide permit pre-construction notification
  • Individual permit alternatives analysis
  • Compensatory mitigation sequencing and tracking
View workflow
02Section 401 Water Quality Certification workflow

Section 401 Water Quality Certification

U.S. Environmental Protection Agency

State / EPA

State water quality certification for federal permits that may result in discharges to waters of the U.S.

  • Certification application and state agency tracking
  • Water quality standards and conditions documentation
  • Reasonable assurance analysis
  • Waiver and denial determination record
View workflow
03NPDES Permitting workflow

NPDES Permitting

U.S. Environmental Protection Agency

EPA / State

Point-source discharge permitting, monitoring, reporting, and permit condition tracking under the Clean Water Act.

  • Permit application and renewal schedules
  • Discharge monitoring report coordination
  • Effluent limitation records
  • Stormwater and industrial compliance tracking
View workflow
SESSIONLIVE WALKTHROUGHCOVERAGE109 DOMAINS · 14 CATS

Program walkthrough

14 regulatory categories

Seecoverageinyourprogram

Walk through domains, agency templates, and export paths with our team.

With the OPEF team

A focused session on your program: where coverage starts, what templates apply, and how exports leave the workspace.

Request a demoBrowse domains first

Typically 30 minutes · tailored to your agency mix

  1. 01
    DomainsMapped to your sites and jurisdictions
  2. 02
    Agency templatesAligned to the programs you run today
  3. 03
    Export pathsDocumented before you commit to a rollout
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