Streamlining Endangered Species Reviews


goal 17 header

Goal 17 aims to increase the efficiency and effectiveness of the Natural Diversity Data Base (NDDB) review process for all stakeholders. NDDB review is a core component of DEEP’s approach to ensuring state permitted activities do not produce adverse effects for rare and imperiled plant and animal species. The complexity of NDDB review and reliance on external parties to complete necessary steps in the process can, at times, result in extended review timelines. This goal seeks to identify additional resources and process improvements that may reduce review timelines and help external parties better understand the process. Background on this goal is presented in DEEP’s 20BY26, Setting the Target: CT DEEP 2026 Goals (February 2024).

arrow-previous quarter Latest Progress (as of October 1, 2025)

As of Q3 2025, the NDDB Program received 837 Review Requests – 41% (346) requests received an immediate response from DEEP through our ezFile NDDB process, and 59% (491) went to a DEEP biologist for review.

Goal 17 Q3 2025 NDDB Review Requests

Of those that DEEP biologists reviewed, the average turnaround time for issuing a determination was 23 days in Q2 and 13 days in Q3 2025. This response time is an improvement over the average turnaround time for issuing NDDB Determinations in 35 days reported previously for 2024 (see Winter 2025 in descriptions of progress from previous quarters).

Goal 17 Q3 2025 NDDB Avg Turnaround Time Biologist Review

To address a required component of the NDDB study outlined in PA 25-84, DEEP and its communications consultant are benchmarking DEEP’s NDDB program with other states’ threatened and endangered species programs – OH, NJ, VA, OR, AZ, PA, MA, GA, NY, and MN. DEEP’s consultant completed qualitative internal and external interviews and is now surveying 400 recent applicants to the NDDB program, with a 40% response rate so far, to assess program function and highlight possible targets for programmatic improvements.

arrow-up next Up Next

DEEP’s consultant will review the NDDB program’s written guidance and communications to provide recommendations on ways to convey information in an even more timely, clear, and customer-oriented way.

Once the consultant finishes analyzing the survey results, DEEP will review this information and prepare the report due to the Legislature in February 2026.

DEEP is working to leverage Power BI, a powerful data organization and interactive graphic tool, to display metrics about the NDDB program.

GOAL 17 PROGRESS FROM PREVIOUS QUARTERS

Spring 2025

In Q2 2025, DEEP’s NDDB program received 247 requests. DEEP provided 93 automated responses from the eNDDB portal with no further review required, and 154 were routed for biologist review. DEEP issued a total of 180 biologist determinations this quarter.

Bar chart showing Total Biologist Reviews Received by Quarter in 2025 and Meter Showing Total Approved versus Received to Date

DEEP began a study to implement section 3 of Governor’s Bill HB 6868, now P.A. 25-84, which directs DEEP to prepare a report that evaluates potential improvements to environmental review undertaken pursuant to the state Endangered Species Act. This review includes an assessment of similar environmental review programs in other states, developing criteria for third party consultant qualifications, and a prioritized list of resources needed to enhance efficiency and predictability for the NDDB program. 

DEEP’s communications consultant worked with Wildlife Division Outreach staff to reorganize NDDB FAQs to optimize user accessibility. DEEP’s consultant also conducted interviews with external stakeholders and NDDB program staff.

Winter 2025

In Q1 2025, DEEP’s NDDB program received 348 requests. Many were related to aquatic invasive species treatment, which increases the baseline number of requests we usually receive in a quarter. DEEP provided 134 automated responses from the eNDDB portal with no further review required, and 214 were routed for biologist review. DEEP issued a total of 213 biologist determinations this quarter.

In 2024, the majority of biologist reviews were completed within 35 days– much faster than the target limit of 10-12 weeks.

DEEP retained a communications consultant to review our published NDDB guidance and instructions, to conduct interviews with various program users, and to survey stakeholders. DEEP explored refinements to the screening mapping tools in the eNDDB application system to help prioritize botanical reviews.

DEEP created the high-level NDDB review process flowchart (below) to provide increased predictability and transparency followed by a description of the steps.

 NDDB Workflow

  • Applicant submittal of an NDDB review request through the eNDDB portal.
  • eNDDB portal automated screening to determine a project’s anticipated impacts to rare species.
    • If none, the portal provides an automated response to the applicant, and no further review. 
    • Otherwise, the portal provides a response indicating biologist review is required.
  • The assigned biologist conducts a “sufficiency review” to determine if the application is complete 
    • If insufficient, the biologist will contact the applicant. 
    • If sufficient, the biologist will commence a technical review. 
  • The target timeline for completion of technical review is 10-12 weeks, although most reviews take under 30 days. The biologist then issues a final NDDB determination letter to the applicant, detailing (1) any anticipated impacts to rare species on the project site, (2) prescribed best management practices for minimizing impacts, and (3) requirements for mitigating unavoidable impacts.
  • During technical review, the biologist may determine that additional information is required and will issue a “Request for Additional Information” letter to the applicant. 
  • Once the applicant submits the required information and the biologist determines it is sufficient, the application will return to the technical review phase. Requests for additional information may add substantial time to the overall timeline (6-12 months).
  • A Final NDDB Determination is issued. 
Fall 2024

DEEP developed a scope of work for an environmental communication specialist to review current communication tools and web content and provide suggestions for improvements and enhancements to existing messaging and instructions. Program botanists continued to work on plant circumscriptions to inform mapping and streamline botanical reviews. Evaluation of NDDB review requests submitted over the last two years (November 2022 – January 2025) shows that approximately 1,200 requests are received annually for biologist review and that approximately the same number of Site Assessment Inquires are submitted and receive an automatic response.

SPATIAL DISTRIBUTION OF NDDB REVIEW REQUESTS SUBMITTED BETWEEN NOVEMBER 2022 AND JANUARY 14, 2025 (approximately 2,500 requests, or approximately 1,200 annually).

SPATIAL DISTRIBUTION OF NDDB REVIEW REQUESTS  

Summer 2024

This stakeholder-suggested goal was launched in August 2024. DEEP assembled a goal team to lead this process improvement effort, and the team began identifying capacity- and process-related factors affecting the efficiency of programmatic review. For example, aquatic pesticide reviews are challenging to complete on a short timeframe without an aquatic botanist on staff due to the research involved. Having a dedicated NDDB email enables direct communication with the public, but managing the high volume of emails is challenging.


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Content last updated February 2026.