Modern Concepts Inc
Active WDID 4 19I018552 Compton, Los Angeles County Region 4 · Los Angeles
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Compton, Los Angeles County
- Region 4 · Los Angeles · Location · Statewide map
- Receiving water
- Pacific Ocean Via Dominguez Channel (as reported by the facility)
- Evidence: not confirmed Details
- Identified receiving water on the 2026 303(d) list
- Not established
- Shown only when the reported receiving water is identified and corroborated.
- 2026 Integrated Report waters within 1.0 km Evidence: geographic proximity
- 2 waterbodies; 2 on the 2026 303(d) list
- Proximity only; not a discharge pathway · Nearby waterbodies
- Monitoring results Evidence: facility-reported
- 66 distinct results, 7 reporting years (2017 to 2025)
- Most recent sample Feb 16, 2026 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 3 inspections · 10 violation records · 6 enforcement actions
- Counts as published in SMARTS; not a compliance determination · Details
Each label shows where a statement comes from. How to read the labels.
Overview and location
Reported facility location HUC12 watershed Corroborated receiving water 2026 Integrated Report waterbodies nearby
Reported location Evidence: facility-reported
- Coordinates
- 33.86244, -118.206398
- Precision
- 5 decimal places
- Shared point
- No
- Matches application record
- same
Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.
- Facility address
- 3121 Ana 3121 E Ana Street, Compton 90221
- Regional Water Board
- 4 — Los Angeles
HUC12 watershed Evidence: spatial
- Compton Creek-Los Angeles River HUC12 180701050402
The facility's reported location lies within this HUC12 watershed (spatial derivation); it is not a discharge location.
Permits and applications Evidence: SMARTS record
Current permit record
- Permit type
- Industrial
- Application type
- Notice of Intent (WDID code I)
- Status
- Active
- Operator
- Modern Concepts Inc
- Primary industry (SIC)
- 3087-Custom Compounding of Purchased Plastics Resins
- Application ID
- 191659
- NOI processed
- Dec 30, 2003
- Last certified
- May 19, 2015
- Facility size
- 78408 SqFt
- Impervious area
- 43.45 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 191659 | Industrial | Active | Dec 30, 2003 | — | May 19, 2015 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Pacific Ocean Via Dominguez Channel
- Discharges directly / indirectly
- N / Y (as answered in the permit application)
Evidence: not confirmed Not matchable to a single waterbody
Receiving-water text as reported by the discharger in SMARTS; no waterbody identification has been confirmed.
Impaired waters and TMDLs
Two kinds of information, kept apart: 2026 Integrated Report waterbodies near the reported location (geographic proximity only), and TMDL records that SMARTS lists for this facility. Neither establishes where the facility discharges; see Receiving water for the facility's own statement.
Nearby waterbodies Evidence: geographic proximity
Spatial proximity only; discharge pathway not established. Being near a waterbody does not mean the facility discharges to it.
| Waterbody (2026 Integrated Report) | Distance | 2026 303(d) list | Appendix A decisions |
|---|---|---|---|
| Los Angeles River Reach 2 (Carson to Figueroa Street) CAR4051501019990202085021 | 754 m | listed | 9 |
| Compton Creek CAR4051501019990202111430 | 857 m | listed | 8 |
Waterbodies within 1.0 km of the reported facility location. Method proximity/1.
SMARTS TMDL records Evidence: SMARTS-reported
No TMDL records for this facility in the SMARTS TMDL export.
Reported monitoring results Evidence: facility-reported
Numeric Action Level (NAL) screening is being independently validated and is not shown. Nothing on this page states whether a result exceeded a NAL.
66 distinct measurements across 3 parameters, most recent sample Feb 16, 2026.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 9 | 3 | 0 | Nov 14, 2025 | Feb 16, 2026 |
| 2024 | 6 | 3 | 0 | Feb 05, 2025 | Feb 13, 2025 |
| 2023 | 9 | 3 | 0 | Dec 20, 2023 | Feb 05, 2024 |
| 2022 | 12 | 3 | 0 | Nov 09, 2022 | Apr 01, 2023 |
| 2021 | 12 | 3 | 0 | Dec 14, 2021 | Dec 29, 2021 |
| 2020 | 9 | 3 | 0 | Dec 28, 2020 | Mar 03, 2021 |
| 2017 | 9 | 3 | 0 | Jan 08, 2018 | Mar 22, 2018 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 22 | 6 | Jan 08, 2018 | Feb 16, 2026 | Results |
| pH | SU | 22 | 0 | Jan 08, 2018 | Feb 16, 2026 | Results |
| Total Suspended Solids (TSS) | mg/L | 22 | 1 | Jan 08, 2018 | Feb 16, 2026 | Results |
All results (66 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Feb 16, 2026 | Oil and Grease | < 2 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1377288 | |
| Feb 16, 2026 | pH | 5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1377288 | |
| Feb 16, 2026 | Total Suspended Solids (TSS) | 12 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1377288 | |
| Nov 20, 2025 | Oil and Grease | < 2.1 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1377288 | |
| Nov 20, 2025 | pH | 4 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1377288 | |
| Nov 20, 2025 | Total Suspended Solids (TSS) | 55 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1377288 | |
| Nov 14, 2025 | Oil and Grease | 2.4 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1377288 | |
| Nov 14, 2025 | pH | 4 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1377288 | |
| Nov 14, 2025 | Total Suspended Solids (TSS) | 10 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1377288 | |
| Feb 13, 2025 | Oil and Grease | 3.84 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1344254 | |
| Feb 13, 2025 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1344254 | |
| Feb 13, 2025 | Total Suspended Solids (TSS) | 16.2 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1344254 | |
| Feb 05, 2025 | Oil and Grease | 2.26 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1344254 | |
| Feb 05, 2025 | pH | 5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1344254 | |
| Feb 05, 2025 | Total Suspended Solids (TSS) | 9.41 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1344254 | |
| Feb 05, 2024 | Oil and Grease | 6.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1290151 | |
| Feb 05, 2024 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1290151 | |
| Feb 05, 2024 | Total Suspended Solids (TSS) | 2.5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1290151 | |
| Jan 22, 2024 | Oil and Grease | 6.83 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1290151 | |
| Jan 22, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1290151 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1290151 | |
| Dec 20, 2023 | Oil and Grease | 6.58 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1290151 | |
| Dec 20, 2023 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1290151 | |
| Dec 20, 2023 | Total Suspended Solids (TSS) | 50 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1290151 | |
| Apr 01, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1250588 | |
| Apr 01, 2023 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1250588 | |
| Apr 01, 2023 | Total Suspended Solids (TSS) | 42 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1250588 | |
| Jan 10, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1250588 | |
| Jan 10, 2023 | pH | 5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1250588 | |
| Jan 10, 2023 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1250588 | |
| Dec 26, 2022 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1250588 | |
| Dec 26, 2022 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1250588 | |
| Dec 26, 2022 | Total Suspended Solids (TSS) | 9.3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1250588 | |
| Nov 09, 2022 | Oil and Grease | 2.6 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1250588 | |
| Nov 09, 2022 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1250588 | |
| Nov 09, 2022 | Total Suspended Solids (TSS) | 34 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1250588 | |
| Dec 29, 2021 | Oil and Grease | 2.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1199510 | |
| Dec 29, 2021 | pH | 5.5 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1199510 | |
| Dec 29, 2021 | Total Suspended Solids (TSS) | 15 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1199510 | |
| Dec 23, 2021 | Oil and Grease | 5.4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1199498 | |
| Dec 23, 2021 | Oil and Grease | 5.4 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1199510 | |
| Dec 23, 2021 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1199498 | |
| Dec 23, 2021 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1199510 | |
| Dec 23, 2021 | Total Suspended Solids (TSS) | 110 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1199498 | |
| Dec 23, 2021 | Total Suspended Solids (TSS) | 110 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1199510 | |
| Dec 14, 2021 | Oil and Grease | 2.1 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1199522 | |
| Dec 14, 2021 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1199522 | |
| Dec 14, 2021 | Total Suspended Solids (TSS) | 25 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1199522 | |
| Mar 03, 2021 | Oil and Grease | 2.2 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1154478 | |
| Mar 03, 2021 | pH | 4 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1154478 |
Results are shown exactly as reported by the discharger. Identical rows repeated in the State's export are shown once. Where the export contains different versions of the same sample and parameter, each version is listed and flagged. Details.
Compliance and enforcement records Evidence: SMARTS record
These are records as the State Water Board publishes them in SMARTS, with the source's own types and statuses. They are not a compliance determination or rating. A record listed here is not proof of a violation beyond what the source states, and the absence of records does not establish compliance.
| Record type | Records | As published | Dates | Retrieved | List |
|---|---|---|---|---|---|
| Violations | 10 | 10 Violation · 0 Potential (preliminary) · 0 Dismissed | Aug 28, 2007 – Aug 28, 2020 | Oct 21, 2026 | All violations |
| Enforcement actions | 6 | 6 issued · 0 draft · 0 withdrawn, rescinded or superseded | Aug 28, 2007 – Aug 28, 2020 | Oct 21, 2026 | All actions |
| Inspections | 3 | inspections, not findings | Jan 04, 10 – Dec 02, 2013 | Oct 21, 2026 | All inspections |
| Annual reports | 11 | certified reports (contents not shown) | 2015 – 2025 | Oct 21, 2026 | All reports |
| Water-quality-based corrective action reports | 0 | reports, by parameter | — | Oct 21, 2026 |
Each record type is counted by its own SMARTS identifier. A violation and the enforcement action that cites it are two records in two lists; they are never added together.
Chronological record history (30 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 15, 2026 | Annual reports | 1334993 | Annual report 2025 | — | |
| Jul 11, 2025 | Annual reports | 1293790 | Annual report 2024 | — | |
| Jul 12, 2024 | Annual reports | 1242848 | Annual report 2023 | — | |
| Jul 14, 2023 | Annual reports | 1188833 | Annual report 2022 | — | |
| Jul 15, 2022 | Annual reports | 1112170 | Annual report 2021 | — | |
| Jul 16, 2021 | Annual reports | 1068162 | Annual report 2020 | — | |
| Aug 28, 2020 | Enforcement actions | 437309 | NOV (Notice of Violation) | Historical | |
| Aug 28, 2020 | Violations | 873760 | Late Report | Violation | Report |
| Jul 08, 2020 | Annual reports | 985386 | Annual report 2019 | — | |
| Jul 15, 2019 | Annual reports | 952917 | Annual report 2018 | — | |
| Aug 24, 2018 | Enforcement actions | 430308 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Aug 24, 2018 | Violations | 867403 | Late Report | Violation | Report |
| Aug 23, 2018 | Annual reports | 938331 | Annual report 2017 | — | |
| Jun 29, 2017 | Annual reports | 877544 | Annual report 2016 | — | |
| Jul 07, 2016 | Annual reports | 839539 | Annual report 2015 | — | |
| Dec 15, 2014 | Enforcement actions | 417177 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 02, 2014 | Violations | 855382 | Late Report | Violation | Report |
| Dec 30, 2013 | Enforcement actions | 414582 | NOV (Notice of Violation) | Historical | |
| Dec 02, 2013 | Inspections | 2020753 | B Type compliance | — | Additional Info Required |
| Dec 02, 2013 | Violations | 853179 | Deficient BMP Implementation | Violation | Inspection |
| Dec 02, 2013 | Violations | 853180 | Incomplete/Insufficient SWPPP | Violation | Inspection |
| Jul 02, 2013 | Violations | 853275 | Late Report | Violation | Report |
| Aug 10, 2012 | Enforcement actions | 409636 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 02, 2012 | Violations | 853274 | Late Report | Violation | Report |
| Jul 02, 2011 | Violations | 848878 | Late Report | Violation | Report |
Sources and provenance
| Information | Source | Retrieved or published |
|---|---|---|
| Permit, location, receiving-water text | SMARTS Industrial Application Specific Data | Oct 20, 2026 |
| Permit history | SMARTS Storm Water Applications | Oct 20, 2026 |
| Monitoring results | SMARTS Industrial Parameter Data | Oct 20, 2026 |
| Watershed Boundary Dataset HU2 GeoPackages 15, 16, 18 (WBDHU12) | USGS | 2026-10-22 |
| 2026 California Integrated Report, Appendix A: 2026 303(d) List (final) | SWRCB | 2026-10-22 |
| Final_2026_Rivers_and_Streams + Final_2026_Lakes_and_Reservoirs (FeatureServer 0) | SWRCB GIS | 2026-10-22 |
| SMARTS TMDL requirements | SMARTS | 2026-10-21 |
Relationships computed 2026-10-22 with methods facility_huc12/1, proximity/1, receiving_water/2, tmdl_reference/1, waterbody_huc12_ovl/1, waterbody_huc12_pub/1; proximity threshold 1.0 km.
How to read the evidence labels
- Evidence: SMARTS record Evidence: facility-reported Information as published in SMARTS or reported by the discharger.
- Evidence: identification corroborated The reported receiving-water name identifies one official waterbody and the facility's location is consistent with it. It does not establish a discharge pathway.
- Evidence: candidate, awaiting review Evidence: not confirmed The reported name could match one or more official waterbodies, but no identification has been confirmed; nothing is assigned without review.
- Evidence: spatial Evidence: geographic proximity Derived from the reported location only.
- Evidence: SMARTS-reported Source records whose links to official references are not yet reviewed.
- Evidence: unavailable The information could not be loaded or is not in the sources.
Records are shown as published and are not compliance determinations. How geographic context is derived.