Membership
Let’s Make an Impact Together!
CASQA is a nonprofit organization that advances sustainable stormwater management protective of California water resources. With well over 2,000 members, our membership is comprised of a diverse range of stormwater quality management organizations and individuals, including cities, counties, special districts, federal agencies, state agencies, ports, universities and school districts, wastewater agencies, water suppliers, industries, and consulting firms. Through our members, CASQA represents over 34 million people in California.
Membership is open to all organizations and individuals who are interested in advancing sustainable stormwater management. Join now to be a part of the collective voice and support CASQA’s projects and programs. Together, we can make a difference!
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Member Status
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Membership Benefits
By joining CASQA, you are advancing sustainable stormwater management. Simply put – membership makes our work possible.
Membership in CASQA also gives you access to resources, networks, and support for your stormwater programs.
As a member, you’ll gain:
- Advocacy and Engagement Opportunities: Amplify your voice and gain knowledge that supports your programs.
- Member Only Programs: Members have exclusive access to the Legislation, Policy and Permitting, Phase II, Construction, and Industrial Subcommittees.
- Free Educational Seminars: Members have access to the CASQA Seminar Series, all-day virtual education events that feature top experts in the field.
- Weekly Educational Resources: Stay current on important stormwater news through the Water Quality NewsFlash and CASQA Member Bi-Weekly Update, delivered weekly to your inbox.
- Professional Development: Build your skills and connect with leaders in the stormwater community.
- Job Board Advertising Rights: Advertise your open recruitments to the most engaged and highly skilled audience in stormwater management.
- Exclusive Resources: Unlock member-only tools like the Legislation Tracker and Regulatory Tracker. BMP Handbooks require separate subscriptions.
- Discounts on Events and Resources: Save on registration for the CASQA Annual Conference and BMP Handbook subscriptions.
Membership Types and Categories
- Regular Memberships: Available to organizations that are subject to or hold a National Pollutant Discharge Elimination System (NPDES) stormwater permit. Categories include individual MS4s; areawide MS4s; educational institutions; transportation districts, airports, and ports; utilities (water districts, wastewater, and power); and other permittees.
- Affiliate Memberships: Available to organizations, legal entities, or individuals that do not hold or are not subject to an NPDES stormwater permit. Categories include individuals; consultants, vendors, sole proprietors, trade associations, nonprofits, others; and local, state, federal, institutional entities.
- Student Membership: Available to full-time students in undergrad, master’s, and PhD degree programs. Eligible students are required to submit an application including a copy of their current student I.D.. Upon approval, the applicant will receive an email with a link for online payment of the $50 fee (credit card only).
For current detailed definitions, view our complete membership categories and tiers.
Future Update: In 2026, several definitions will be clarified, particularly for areawide programs. See the membership categories and tiers effective January 1, 2026. For Affiliate Memberships, the current categories and tiers are under review and may change in 2026.
2025 Membership Dues
In 2025, the dues structure continues to move toward our goals of equity and adds clarity for the types of memberships available for regulated organizations (regular members)
2026 Membership Dues
In 2026, the dues structure achieves equity for all municipal membership categories.
- Affiliate Membership Dues (not yet published; anticipated in 2025)
Renew Your Membership
CASQA makes it easy to stay connected. To renew your membership, simply log in to your My Account page and select the Renew or Repurchase link to the right of the product under the Orders tab. You’ll receive reminders via email when it’s time to renew, so you never miss out on exclusive member benefits. Need assistance? Contact us.
Purchase a New Membership
Regular Membership
Available to organizations that are subject to or hold a National Pollutant Discharge Elimination System (NPDES) stormwater permit.
Affiliate Membership
Available to organizations, legal entities, or individuals that do not hold or are not subject to an NPDES stormwater permit.
Have Questions? We’re Here to Help!
For questions about membership, dues, or the renewal process, please check out these Membership FAQs, or reach out to our Membership Team at casqa@casqa.org.
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