Northrop Grumman Systems Corporation
Active WDID 2 43I016848 Sunnyvale, Santa Clara County Region 2 · San Francisco Bay
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Sunnyvale, Santa Clara County
- Region 2 · San Francisco Bay · Location · Statewide map
- Receiving water
- City Of Sunnyvale E Chnnel (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
- None
- Monitoring results Evidence: facility-reported
- 337 distinct results, 11 reporting years (2015 to 2025)
- Most recent sample Oct 13, 2025 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 1 inspection · 0 violation records · 0 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
- 37.37696, -122.02497
- Precision
- 5 decimal places
- Shared point
- 3 permits report this exact point
- Matches application record
- same
Facility location as reported by the discharger in SMARTS; not a discharge point or outfall.
- Facility address
- 401 E Hendy Ave M S 62 1, Sunnyvale 94088
- Regional Water Board
- 2 — San Francisco Bay
HUC12 watershed Evidence: spatial
- Calabazas Creek-Frontal San Francisco Bay Estuaries HUC12 180500030405
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
- Northrop Grumman Systems Corporation
- Primary industry (SIC)
- 3621-Motors and Generators
- Application ID
- 184273
- NOI processed
- Oct 05, 2001
- Last certified
- Oct 01, 2026
- Facility size
- 73 Acres
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 184273 | Industrial | Active | Oct 05, 2001 | — | Oct 01, 2026 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- City Of Sunnyvale E Chnnel
- 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.
No 2026 Integrated Report waterbody lies within the proximity threshold of the reported location.
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.
337 distinct measurements across 5 parameters, most recent sample Oct 13, 2025.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2025 | 15 | 5 | 0 | Oct 13, 2025 | Oct 13, 2025 |
| 2024 | 40 | 5 | 0 | Nov 11, 2024 | Mar 12, 2025 |
| 2023 | 35 | 5 | 0 | Dec 06, 2023 | Apr 04, 2024 |
| 2022 | 45 | 5 | 0 | Nov 01, 2022 | Mar 28, 2023 |
| 2021 | 10 | 5 | 0 | Dec 13, 2021 | Dec 13, 2021 |
| 2020 | 30 | 5 | 0 | Jan 04, 2021 | Feb 11, 2021 |
| 2019 | 30 | 5 | 0 | Dec 18, 2019 | Jan 16, 2020 |
| 2018 | 50 | 5 | 0 | Jan 15, 2019 | Mar 27, 2019 |
| 2017 | 34 | 4 | 0 | Nov 16, 2017 | Mar 01, 2018 |
| 2016 | 21 | 3 | 0 | Dec 15, 2016 | Jan 18, 2017 |
| 2015 | 27 | 3 | 0 | Nov 02, 2015 | Jan 05, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Oil and Grease | mg/L | 76 | 44 | Nov 02, 2015 | Oct 13, 2025 | Results |
| pH | SU | 76 | 0 | Nov 02, 2015 | Oct 13, 2025 | Results |
| Total Suspended Solids (TSS) | mg/L | 76 | 5 | Nov 02, 2015 | Oct 13, 2025 | Results |
| Polychlorinated Biphenyls (PCBs), Sum | ug/L | 58 | 17 | Nov 16, 2017 | Oct 13, 2025 | Results |
| Iron, Total | mg/L | 51 | 15 | Jan 15, 2019 | Oct 13, 2025 | Results |
All results (337 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Oct 13, 2025 | Iron, Total | 1.22 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1364813 | |
| Oct 13, 2025 | Iron, Total | 1.04 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1364813 | |
| Oct 13, 2025 | Iron, Total | .919 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1364813 | |
| Oct 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1364813 | |
| Oct 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1364813 | |
| Oct 13, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1364813 | |
| Oct 13, 2025 | pH | 8.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 1364813 | |
| Oct 13, 2025 | pH | 7.25 | SU | Effluent | Qualifying Storm Event | pH_Field | 1364813 | |
| Oct 13, 2025 | pH | 6.7 | SU | Effluent | Qualifying Storm Event | pH_Field | 1364813 | |
| Oct 13, 2025 | Polychlorinated Biphenyls (PCBs), Sum | .0631 | ug/L | Effluent | Qualifying Storm Event | DU | 1364813 | |
| Oct 13, 2025 | Polychlorinated Biphenyls (PCBs), Sum | .165 | ug/L | Effluent | Qualifying Storm Event | DU | 1364813 | |
| Oct 13, 2025 | Polychlorinated Biphenyls (PCBs), Sum | .034 | ug/L | Effluent | Qualifying Storm Event | DU | 1364813 | |
| Oct 13, 2025 | Total Suspended Solids (TSS) | 31.7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1364813 | |
| Oct 13, 2025 | Total Suspended Solids (TSS) | 75.6 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1364813 | |
| Oct 13, 2025 | Total Suspended Solids (TSS) | 17.7 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1364813 | |
| Mar 12, 2025 | Iron, Total | DNQ .44 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1328554 | |
| Mar 12, 2025 | Iron, Total | 2.4 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1328554 | |
| Mar 12, 2025 | Iron, Total | DNQ .46 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1328554 | |
| Mar 12, 2025 | Oil and Grease | DNQ .68 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1328554 | |
| Mar 12, 2025 | Oil and Grease | 3.5 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1328554 | |
| Mar 12, 2025 | Oil and Grease | 1.8 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1328554 | |
| Mar 12, 2025 | pH | 6.5 | SU | Effluent | Qualifying Storm Event | pH_Field | 1328554 | |
| Mar 12, 2025 | pH | 6.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 1328554 | |
| Mar 12, 2025 | pH | 6.3 | SU | Effluent | Qualifying Storm Event | pH_Field | 1328554 | |
| Mar 12, 2025 | Polychlorinated Biphenyls (PCBs), Sum | .033354 | ug/L | Effluent | Qualifying Storm Event | DU | 1328554 | |
| Mar 12, 2025 | Polychlorinated Biphenyls (PCBs), Sum | .979003 | ug/L | Effluent | Qualifying Storm Event | DU | 1328554 | |
| Mar 12, 2025 | Polychlorinated Biphenyls (PCBs), Sum | .044992 | ug/L | Effluent | Qualifying Storm Event | DU | 1328554 | |
| Mar 12, 2025 | Total Suspended Solids (TSS) | 24 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1328554 | |
| Mar 12, 2025 | Total Suspended Solids (TSS) | 94 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1328554 | |
| Mar 12, 2025 | Total Suspended Solids (TSS) | 23 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1328554 | |
| Jan 03, 2025 | Iron, Total | DNQ .13 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1319893 | |
| Jan 03, 2025 | Iron, Total | DNQ .39 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1319893 | |
| Jan 03, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1319893 | |
| Jan 03, 2025 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1319893 | |
| Jan 03, 2025 | pH | 6.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1319893 | |
| Jan 03, 2025 | pH | 6.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1319893 | |
| Jan 03, 2025 | Polychlorinated Biphenyls (PCBs), Sum | .064 | ug/L | Effluent | Qualifying Storm Event | DU | 1319893 | |
| Jan 03, 2025 | Polychlorinated Biphenyls (PCBs), Sum | .187 | ug/L | Effluent | Qualifying Storm Event | DU | 1319893 | |
| Jan 03, 2025 | Total Suspended Solids (TSS) | 6.3 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1319893 | |
| Jan 03, 2025 | Total Suspended Solids (TSS) | 21 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1319893 | |
| Nov 11, 2024 | Iron, Total | .54 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1315316 | |
| Nov 11, 2024 | Iron, Total | .71 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1315316 | |
| Nov 11, 2024 | Iron, Total | .82 | mg/L | Effluent | Qualifying Storm Event | E200.7 | 1315316 | |
| Nov 11, 2024 | Oil and Grease | DNQ .89 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1315316 | |
| Nov 11, 2024 | Oil and Grease | 1.7 | mg/L | Effluent | Qualifying Storm Event | E1664A | 1315316 | |
| Nov 11, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664A | 1315316 | |
| Nov 11, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1315316 | |
| Nov 11, 2024 | pH | 6.1 | SU | Effluent | Qualifying Storm Event | pH_Field | 1315316 | |
| Nov 11, 2024 | pH | 6 | SU | Effluent | Qualifying Storm Event | pH_Field | 1315316 | |
| Nov 11, 2024 | Polychlorinated Biphenyls (PCBs), Sum | .0450028 | ug/L | Effluent | Qualifying Storm Event | DU | 1315316 |
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 | 0 | 0 Violation · 0 Potential (preliminary) · 0 Dismissed | — | Oct 21, 2026 | |
| Enforcement actions | 0 | 0 issued · 0 draft · 0 withdrawn, rescinded or superseded | — | Oct 21, 2026 | |
| Inspections | 1 | inspections, not findings | May 25, 2023 – May 25, 2023 | 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 (12 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jun 29, 2026 | Annual reports | 1334004 | Annual report 2025 | — | |
| Jul 10, 2025 | Annual reports | 1292770 | Annual report 2024 | — | |
| Jun 30, 2024 | Annual reports | 1241764 | Annual report 2023 | — | |
| Jul 13, 2023 | Annual reports | 1187684 | Annual report 2022 | — | |
| May 25, 2023 | Inspections | 2060455 | B Type compliance | Performed | Additional Info Required |
| Jul 12, 2022 | Annual reports | 1110933 | Annual report 2021 | — | |
| Jul 14, 2021 | Annual reports | 1066859 | Annual report 2020 | — | |
| Jul 01, 2020 | Annual reports | 984004 | Annual report 2019 | — | |
| Jul 09, 2019 | Annual reports | 951497 | Annual report 2018 | — | |
| Jul 05, 2018 | Annual reports | 936903 | Annual report 2017 | — | |
| Jul 12, 2017 | Annual reports | 876042 | Annual report 2016 | — | |
| Jun 30, 2016 | Annual reports | 845533 | Annual report 2015 | — |
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.