What Delta Diablo does

Delta Diablo is a California special district (public agency) that provides wastewater conveyance and treatment services to approximately 218,000 residents across 73,273 customer accounts in the cities of Antioch and Pittsburg and the unincorporated community of Bay Point in Contra Costa County. Operating 24/7/365 from its headquarters at 2500 Pittsburg-Antioch Highway, the district treats approximately 14 million gallons of wastewater per day through a Wastewater Treatment Plant that has been repositioned as a 'resource recovery facility.' Core infrastructure includes anaerobic digesters (stabilizing biosolids while supporting energy recovery), an on-site cogeneration system that supplies over 50% of the WWTP's power needs, and a recycled water facility that produces 6-7 million gallons of recycled water daily for industrial and irrigation uses—one of the largest industrial recycled water operations in California. The sanitary sewer system comprises 43 miles of gravity sewer lines in Bay Point, 18.5 miles of pressurized force mains, 14 miles of gravity sewer interceptors, and 5 pump stations with 4 million gallons of equalization storage.

Delta Diablo generates revenue through three primary streams: Sewer Service Charges (SSCs) collected annually via the Contra Costa County property tax roll as the dominant funding source for operations, capital, and the Household Hazardous Waste Collection Facility; Capital Facilities Capacity Charges (CFCCs) collected from new connections based on a district-wide impact study; and Street Sweeping Service Charges included on property tax bills. The Board of Directors has approved 8.5% maximum annual SSC increases for FY25/26 through FY29/30, and adopted a $238.1 million five-year Capital Improvement Program for that same period. Services are delivered directly under a regulated monopoly franchise; customers cannot choose alternative providers within the district's 54-square-mile service area.

Beyond core wastewater operations, Delta Diablo runs complementary public services including the Delta Household Hazardous Waste Collection Facility (serving 338,158 East Contra Costa County residents under a cost-sharing agreement with neighboring jurisdictions), street sweeping and stormwater management, a Pretreatment/Pollution Prevention Program for industrial customers, and a pilot Residential Recycled Water Fill Station. The district plays a leadership role in regional water-reuse and biosolids coalitions, including serving as lead agency for the Western Recycled Water Coalition (15 member agencies) and as a key member of the Bay Area Biosolids Coalition. Recognized multiple times by NACWA, CWEA, GFOA, and the Governor's Office, the district combines regulated-monopoly revenue stability with environmental compliance obligations tied to its 54-square-mile wastewater service area.

Name

Delta Diablo

Legal name

Delta Diablo

Website

https://deltadiablo.org

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

101–250 employees

Short description

Delta Diablo is a California special district providing wastewater conveyance and treatment to approximately 218,000 residents across 73,273 customer accounts in Antioch, Pittsburg, and Bay Point, operating a resource-recovery facility that treats 14 MGD and produces 6-7 MGD of recycled water.

Ownership category

akta.pro rank

Product category

Municipal Wastewater Treatment & Resource Recovery Services

NAICS

Sewage Treatment Facilities (22132), Water, Sewage and Other Systems (2213), Hazardous Waste Collection (562112)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623)

akta.pro primary industry

Purple Pipe / Recycled Water Distribution Utilities (Networks, Pressure Zones) (EUANAGAE)

Keywords

• Wastewater treatment services
• Recycled water production
• Household hazardous waste
• Street sweeping utilities
• Resource recovery facility

Headquarters

HQ city

Antioch

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Supply Chain, Technology or R&D

Revenue model

1. Sewer Service Charges (SSCs): Primary revenue source collected annually from customers via property tax bills (fiscal-year basis) to fund capital infrastructure investments, labor, energy, biosolids, chemicals, regulatory compliance, infrastructure maintenance, and Delta HHW Collection Facility operations
2. Capital Facilities Capacity Charges (CFCCs): Charges collected for new connections to the wastewater system based on comprehensive CFCC Study evaluating impacts of new development on District facilities
3. Street Sweeping Service Charges: Service charge included on property tax bills varying by community based on service frequency

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Delta Diablo is a California special district that provides wastewater conveyance and treatment services to approximately 218,000 customers across Antioch, Pittsburg, and Bay Point, treating roughly 13-14 million gallons of wastewater daily. The District operates a 'resource recovery facility' that converts wastewater into recycled water (6-7 MGD), renewable energy via on-site cogeneration, and fertilizer-grade biosolids, while also delivering household hazardous waste collection and street sweeping/stormwater services.

Product overview

Delta Diablo provides a unified suite of public utility services centered on wastewater treatment and resource recovery, not a modular software product. Core offerings include wastewater conveyance and treatment (processing 13-14 MGD), recycled water production (6-7 MGD capacity), household hazardous waste collection, and street sweeping/stormwater management. The district operates infrastructure including a Wastewater Treatment Plant with cogeneration capabilities (meeting over 50% of power needs), sewer collection systems spanning 43+ miles of gravity lines and force mains, pump stations with 4 million gallons of storage, and a residential recycled water fill station program. The services function as integrated public health and environmental protection functions rather than discrete software products.

Differentiator

Problem solved

Functional benefit

Products and services

• Wastewater Treatment Service Statutory wastewater conveyance and treatment service processing approximately 13-14 million gallons per day for approximately 218,000 customers across the cities of Antioch and Pittsburg and the unincorporated community of Bay Point; operates 24 hours a day, 365 days a year through municipal infrastructure.
• Recycled Water Production Production of approximately 6-7 million gallons per day of Title 22 recycled water for industrial and irrigation uses, operating one of the largest industrial recycled water plants in California (6.4 MGD).
• Household Hazardous Waste Collection Household hazardous waste collection services for 338,158 East Contra Costa County residents through the Delta Household Hazardous Waste Collection Facility (batteries, electronic waste, mercury, pharmaceuticals, sharps, paint, marine flares, etc.) operated jointly with the cities of Antioch, Brentwood, Oakley, Pittsburg, and Contra Costa County.
• Street Sweeping & Stormwater Pollution Prevention Street sweeping service that removes pollutants from urban streets before they enter the storm drain system, protecting waterways and the Delta ecosystem; service charge billed via property tax roll, frequency varying by community.
• Sanitary Sewer Management Operation and maintenance of the District's wastewater collection system, including 43 miles of gravity sewer lines in Bay Point, 18.5 miles of pressurized force mains, 14 miles of gravity sewer interceptors, and 5 pump stations with 4 million gallons of flow equalization storage.
• Residential Recycled Water Fill Station Pilot service allowing residents to obtain recycled water for irrigation purposes at an on-site fill station for a one-time annual access fee of $50 (unlimited during operating hours up to 300 gallons per trip); currently CLOSED until further notice.
• Pretreatment / Pollution Prevention Program Regulatory pretreatment program for industrial customers discharging to the District's collection system, ensuring wastewater discharges meet applicable standards and protecting the District's treatment infrastructure.

Named customers4 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Four partnerships are on record, tiered core.

• East County Water Management AssociationcoreStrategic or Co-development Partner · 1 January 1997Delta Diablo is a member agency of this regional partnership of eleven agencies working together on water management issues. The collaboration has secured significant grant funding including $12.5M through Proposition 50, $3.3M through Proposition 84, $300,000 under Proposition 1, and $2.7M for Round 1 IRWM Implementation Grant Program.
• Western Recycled Water Coalition (WRWC)coreStrategic or Co-development PartnerDelta Diablo serves as the lead agency for the WRWC, an independent group of 15 cities and public agencies working together to advocate federal funding for water reuse projects. WRWC has helped secure over $50 Million in appropriations and grant funds to construct eleven projects and $3.4 Million for feasibility studies and project planning for 14 new projects.
• Bay Area Biosolids CoalitioncoreStrategic or Co-development PartnerDelta Diablo is a key member of this regional collaboration between San Francisco Bay Area wastewater agencies focused on developing sub-regional projects with a primary focus on beneficial use of biosolids, energy recovery, and fertilizer production from wastewater residuals.
• Cities of Antioch, Brentwood, Oakley, and Pittsburg and Contra Costa CountycoreStrategic or Co-development PartnerCooperative effort for the Household Hazardous Waste (HHW) program. Operating costs for the Delta Household Hazardous Waste Collection Facility are split between the jurisdictions based on actual usage by residents from those jurisdictions.

Scale indicators9 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Inland Empire Utilities Agency: Regional wastewater joint powers authority serving eastern Los Angeles/San Bernardino counties. Comparable in scale and in operating a major recycled water program alongside traditional wastewater treatment.
• Silicon Valley Clean Water: Joint powers authority providing wastewater conveyance and treatment to multiple Silicon Valley communities. Comparable model in scale, customer mix (residential + industrial), and emphasis on recycled water and biosolids management.
• Fairfield-Suisun Sewer District: Solano County wastewater district of comparable size serving two cities. Very similar operating model: conveyance, treatment, recycled water, and resource recovery programs at a similar MGD scale.
• Central Contra Costa Sanitary District: Immediate neighbor wastewater utility serving central Contra Costa County. Similar scale (multi-jurisdictional special district), comparable wastewater treatment mandate, and overlapping regulatory environment; benchmark for regional rate and operational comparisons.
• Clean Water Services (Washington County, OR): Regional water resources management utility in Oregon providing wastewater treatment, stormwater management, and water reuse. Comparable size and resource-recovery orientation to Delta Diablo, useful as a comparable outside California.

Regional players

• Vallejo Flood and Wastewater District: Solano/Napa adjacent wastewater and flood control district. Similar municipal utility profile to Delta Diablo but with a combined flood management mandate that Delta Diablo does not have.

Broad incumbents

• East Bay Municipal Utility District (EBMUD): Large East Bay water and wastewater utility with full-service water supply plus wastewater treatment. Substantially broader geographic and service footprint than Delta Diablo, but operating under the same California regulatory regimes and serving adjacent communities.
• Sacramento Regional County Sanitation District: Large regional wastewater utility serving Sacramento County. Much larger scale but directly comparable in mandate (regional wastewater conveyance, treatment, and recycled water) and regulatory exposure.
• San Francisco Public Utilities Commission: Tri-purpose utility (water, wastewater, power) operating across San Francisco and parts of San Mateo, Alameda, and Santa Clara counties. Comparable in operating environment but much larger and more diversified.
• Orange County Sanitation District: Largest wastewater agency in Orange County and a national leader in water reuse (Groundwater Replenishment System). Useful benchmark for resource-recovery economics and large-scale recycled water programs.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Delta Diablo