California Stormwater Intelligence

Statewide regulatory intelligence

California industrial stormwater data, connected

Registrations, SMARTS monitoring, permit Numeric Action Levels (NALs), TMDL requirements and 2026 303(d) impaired waters in one view. Every record shown is official California State Water Resources Control Board data; anything we calculate is labeled derived.

Search facilities Statewide map
Official sources — Industrial General Permit permitted facilities, SMARTS monitoring and TMDL records, and the Final 2026 California Integrated Report (Clean Water Act 303(d) list)
  • Official source data
  • YDOS-derived intelligence
  • Impaired-water context
Data current as of Sep 16, 2026· Sources are re-checked on a monthly cadence· One or more sources are awaiting a successful update; per-source status is below
What was last updated, and when
  • Industrial stormwater registrationsImported Sep 16, 2026

    California Water Boards Industrial General Permit permitted-facilities GIS layer

  • SMARTS permit registryRetrieved Sep 16, 2026

    SMARTS Regional Board industrial NOI export

  • SMARTS monitoring resultsRetrieved Sep 16, 2026

    SMARTS Regional Board industrial parameter-data export

  • SMARTS TMDL requirementsRetrieved Aug 21, 2026update due

    SMARTS Regional Board industrial TMDL export

    This source is past its monthly update cadence and a refresh is due.

  • Impaired waters (303(d))Imported Sep 16, 2026

    Final 2026 California Integrated Report (Clean Water Act 303(d) list)

  • Derived NAL intelligenceCalculated Sep 16, 2026

    Calculated from the current SMARTS monitoring snapshot and versioned Industrial General Permit numeric action levels

  • Document inventoryRetrieved Sep 6, 2026

    SMARTS public attachment workflow

  • Recent source changesCalculated —

    SMARTS public attachment workflow

Published regulatory cycles — such as the Final 2026 California Integrated Report — do not change between cycles, so their import date stays fixed until the State Water Resources Control Board publishes a new cycle. Monitoring, permit registry and TMDL records are merged incrementally: unchanged official records keep their original values.

Statewide totals

19,703
Industrial registrations
—
SMARTS monitoring results
1,679
Impaired waterbodies (303(d))
57,763
Derived facility-to-water associations
  1. Facility registration
  2. SMARTS monitoring
  3. Permit Numeric Action Levels (NALs)
  4. TMDL requirements
  5. Impaired receiving waters

Industrial stormwater records

19,703

Official IGP permitted-facility registrations statewide

Notices of Intent

8,756

Permit coverage filings · 9,143 No Exposure Certifications

Facilities associated with 303(d) waters

16,813

Derived geographic association — not confirmed discharge

Impaired waterbodies (303(d))

1,679

5,962 official 2026 listing decisions

One facility, every dataset

What a facility record looks like here

A real Region 4 registration, shown exactly as the site presents it: official Water Board records first, derived comparisons labeled as derived.

Open this facility

Universal Molding Co Inc

4 19I014397 · Lynwood · Notice of Intent

Official IGP registration

SMARTS monitoring

0

reported results · 0 parameters

Derived NAL comparison

0

parameters above an IGP Numeric Action Level in the latest reporting year

No above-NAL parameter in the latest reporting year

Derived

SMARTS TMDL requirements

0

Water Board-stated limits across 0 TMDLs

None stated for this permit

303(d) context

0

associated 2026 impaired waters · 0 same-pollutant overlaps

No same-pollutant overlap

Derived

Statewide view

Facility registrations across California

Marker shading reflects the official permit application type. Facility detail loads only when a point is selected.

Open full map
Loading map…
NOINECNONARegion 8 Scrap Metal19,703 points · 57,763 derived facility-to-impaired-water associations

Information architecture

What this intelligence connects today

Each link in the chain is a distinct official dataset, joined on the Water Board's own identifiers.

  1. Facility registrationOfficial IGP record: facility, WDID, application type, location
  2. SMARTS monitoringReported analytical results by parameter and reporting year
  3. Permit Numeric Action Levels (NALs)Derived comparison to the applicable IGP Numeric Action Levels
  4. TMDL requirementsWater Board-stated waste load allocations recorded in SMARTS
  5. Impaired receiving watersFinal 2026 Integrated Report geometry and listed pollutants

19,623 of 19,703 facility points fall inside one of 4,473 official USGS HUC12 subwatersheds. Permit violations and formal enforcement history are not part of this release.

Getting started

How to use California Stormwater Intelligence

Five steps, or take the 90-second guided demo.

  1. 01

    Search a facility by name or WDID, or explore the statewide map.

  2. 02

    Review the facility's official Water Board registration record.

  3. 03

    Review its SMARTS monitoring history in one place.

  4. 04

    Examine derived NAL comparisons — not official determinations.

  5. 05

    Review SMARTS TMDL requirements and 2026 303(d) context, then follow the source links.