Dover Engineering Systems an affiliate of Dover Corporation

Active WDID 4 19I024223 Sylmar, 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
Sylmar, Los Angeles County
Region 4 · Los Angeles · Location · Statewide map
Receiving water
River (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
1,360 distinct results, 11 reporting years (2015 to 2025)
Most recent sample Feb 16, 2026 · Monitoring
Compliance and enforcement records Evidence: SMARTS record
1 inspection · 6 violation records · 4 enforcement actions
Counts as published in SMARTS; not a compliance determination · Details
SMARTS TMDL records Evidence: SMARTS-reported
0 records
TMDL records

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

Open this facility on the statewide map

Reported location Evidence: facility-reported

Coordinates
34.29459, -118.40989
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
12391 Montero Avenue, Sylmar 91342
Regional Water Board
4 — Los Angeles

HUC12 watershed Evidence: spatial

  • Tujunga Wash-Los Angeles River HUC12 180701050208

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
Dover Engineering Systems an affiliate of Dover Corporation
Primary industry (SIC)
3231-Glass Products, Made of Purchased Glass
Application ID
437030
NOI processed
Apr 23, 2013
Last certified
Sep 25, 2024
Facility size
9.91 Acres
Impervious area
99 %

Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.

Permit history

Storm water applications for this WDID, newest first
ApplicationTypeStatusProcessedTerminatedCertified
437030 IndustrialActiveApr 23, 2013 —Sep 25, 2024

Every storm water application SMARTS records for this WDID, newest first (1).

Receiving water

Reported by the facility Evidence: facility-reported
River
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.

1,360 distinct measurements across 7 parameters, most recent sample Feb 16, 2026.

By reporting year

Distinct results by reporting year
Reporting year (July–June)Distinct resultsParametersWith several versionsFirst sampleLast sample
2025844 0 Oct 14, 2025Feb 16, 2026
2024777 0 Feb 05, 2025Feb 13, 2025
20231687 0 Nov 16, 2023Feb 20, 2024
20221057 0 Nov 08, 2022Jan 09, 2023
20211407 0 Oct 25, 2021Mar 28, 2022
20201407 0 Dec 28, 2020Mar 15, 2021
20191206 0 Dec 04, 2019Apr 09, 2020
2018906 0 Nov 29, 2018Feb 14, 2019
20171206 0 Jan 09, 2018Mar 21, 2018
20161256 0 Jan 05, 2017Feb 17, 2017
20151915 0 Jul 18, 2015Mar 11, 2016

By parameter

Distinct results by parameter
ParameterUnitsMeasurementsBelow detectionFirst sampleLast sampleResults
Aluminum, Totalmg/L226 146Jul 18, 2015Feb 16, 2026 Results
Oil and Greasemg/L226 125Jul 18, 2015Feb 16, 2026 Results
Total Suspended Solids (TSS)mg/L225 89Jul 18, 2015Feb 16, 2026 Results
pHSU223 0Sep 14, 2015Feb 16, 2026 Results
Zinc, Totalmg/L205 37Jul 18, 2015Feb 13, 2025 Results
Chemical Oxygen Demand (COD)mg/L165 13Jan 10, 2017Feb 13, 2025 Results
Ammonia, Total (as N)mg/L90 16Dec 28, 2020Feb 13, 2025 Results

All results (1,360 distinct rows)

Reported monitoring results, newest first
Sample dateParameterResultUnitsLocation typeEventMethodReportVersions
Feb 16, 2026 Aluminum, Total .537 mg/L Effluent Qualifying Storm Event E200.8 1373712
Feb 16, 2026 Aluminum, Total .72 mg/L Effluent Qualifying Storm Event E200.8 1373712
Feb 16, 2026 Aluminum, Total .334 mg/L Effluent Qualifying Storm Event E200.8 1373712
Feb 16, 2026 Aluminum, Total .226 mg/L Effluent Qualifying Storm Event E200.8 1373712
Feb 16, 2026 Aluminum, Total .394 mg/L Effluent Qualifying Storm Event E200.8 1373712
Feb 16, 2026 Aluminum, Total .196 mg/L Effluent Qualifying Storm Event E200.8 1373712
Feb 16, 2026 Aluminum, Total .404 mg/L Effluent Qualifying Storm Event E200.8 1373712
Feb 16, 2026 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1373712
Feb 16, 2026 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1373712
Feb 16, 2026 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1373712
Feb 16, 2026 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1373712
Feb 16, 2026 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1373712
Feb 16, 2026 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1373712
Feb 16, 2026 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1373712
Feb 16, 2026 pH 8.2 SU Effluent Qualifying Storm Event pH_Field 1373712
Feb 16, 2026 pH 9.4 SU Effluent Qualifying Storm Event pH_Field 1373712
Feb 16, 2026 pH 8.7 SU Effluent Qualifying Storm Event pH_Field 1373712
Feb 16, 2026 pH 8.5 SU Effluent Qualifying Storm Event pH_Field 1373712
Feb 16, 2026 pH 8.1 SU Effluent Qualifying Storm Event pH_Field 1373712
Feb 16, 2026 pH 8.6 SU Effluent Qualifying Storm Event pH_Field 1373712
Feb 16, 2026 pH 7.8 SU Effluent Qualifying Storm Event pH_Field 1373712
Feb 16, 2026 Total Suspended Solids (TSS) 24 mg/L Effluent Qualifying Storm Event A2540D 1373712
Feb 16, 2026 Total Suspended Solids (TSS) 42 mg/L Effluent Qualifying Storm Event A2540D 1373712
Feb 16, 2026 Total Suspended Solids (TSS) 10 mg/L Effluent Qualifying Storm Event A2540D 1373712
Feb 16, 2026 Total Suspended Solids (TSS) 24 mg/L Effluent Qualifying Storm Event A2540D 1373712
Feb 16, 2026 Total Suspended Solids (TSS) 34 mg/L Effluent Qualifying Storm Event A2540D 1373712
Feb 16, 2026 Total Suspended Solids (TSS) 5 mg/L Effluent Qualifying Storm Event A2540D 1373712
Feb 16, 2026 Total Suspended Solids (TSS) 18 mg/L Effluent Qualifying Storm Event A2540D 1373712
Dec 31, 2025 Aluminum, Total .1 mg/L Effluent Qualifying Storm Event E200.7 1366268
Dec 31, 2025 Aluminum, Total .92 mg/L Effluent Qualifying Storm Event E200.7 1366268
Dec 31, 2025 Aluminum, Total .12 mg/L Effluent Qualifying Storm Event E200.7 1366268
Dec 31, 2025 Aluminum, Total ND mg/L Effluent Qualifying Storm Event E200.7 1366268
Dec 31, 2025 Aluminum, Total .14 mg/L Effluent Qualifying Storm Event E200.7 1366268
Dec 31, 2025 Aluminum, Total .15 mg/L Effluent Qualifying Storm Event E200.7 1366268
Dec 31, 2025 Aluminum, Total .42 mg/L Effluent Qualifying Storm Event E200.7 1366268
Dec 31, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1366268
Dec 31, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1366268
Dec 31, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1366268
Dec 31, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1366268
Dec 31, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1366268
Dec 31, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1366268
Dec 31, 2025 Oil and Grease ND mg/L Effluent Qualifying Storm Event E1664A 1366268
Dec 31, 2025 pH 8.2 SU Effluent Qualifying Storm Event A4500HB 1366268
Dec 31, 2025 pH 8.5 SU Effluent Qualifying Storm Event A4500HB 1366268
Dec 31, 2025 pH 7.9 SU Effluent Qualifying Storm Event A4500HB 1366268
Dec 31, 2025 pH 8.1 SU Effluent Qualifying Storm Event A4500HB 1366268
Dec 31, 2025 pH 8.3 SU Effluent Qualifying Storm Event A4500HB 1366268
Dec 31, 2025 pH 8.5 SU Effluent Qualifying Storm Event A4500HB 1366268
Dec 31, 2025 pH 8.6 SU Effluent Qualifying Storm Event A4500HB 1366268
Dec 31, 2025 Total Suspended Solids (TSS) 10 mg/L Effluent Qualifying Storm Event A2540D 1366268

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.

Compliance and enforcement records by type
Record typeRecordsAs publishedDatesRetrievedList
Violations6 5 Violation · 1 Potential (preliminary) · 0 Dismissed Jul 30, 2020 – Dec 18, 2022 Oct 21, 2026 All violations
Enforcement actions4 4 issued · 0 draft · 0 withdrawn, rescinded or superseded Jul 30, 2020 – Dec 16, 2025 Oct 21, 2026 All actions
Inspections1inspections, not findings Aug 14, 2025 – Aug 14, 2025 Oct 21, 2026 All inspections
Annual reports11certified reports (contents not shown) 2015 – 2025 Oct 21, 2026 All reports
Water-quality-based corrective action reports2reports, by parameter 2022-23 – 2023-24 Oct 21, 2026 All reports

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 (24 records, newest first)
Compliance and enforcement records, newest first
DateRecordIDType or purposeStatus as publishedDetail
Jun 29, 2026 Annual reports 1338173 Annual report 2025 —
Dec 16, 2025 Enforcement actions 468130 EPL (Expedited Payment Letter) HistoricalR4-2025-0068
Aug 14, 2025 Inspections 2068691 B Type compliance PerformedAdditional Info Required
Jul 10, 2025 Annual reports 1297153 Annual report 2024 —
Sep 30, 2024 Annual reports 1246372 Annual report 2023 —
Sep 30, 2024 Water-quality-based corrective action reports 1282379 WQBCAR 2023-24 —Zinc, Total
Jul 14, 2023 Annual reports 1192516 Annual report 2022 —
Dec 18, 2022 Violations 902644 Late Report ViolationReport
Aug 26, 2022 Water-quality-based corrective action reports 1203720 WQBCAR 2022-23 —Zinc, Total
Jul 06, 2022 Annual reports 1116210 Annual report 2021 —
Jun 30, 2022 Enforcement actions 446754 ACL (Administrative Civil Liability) HistoricalR4-2022-0190
Jun 30, 2022 Violations 881974 Effluent ViolationReport
Feb 11, 2022 Violations 902642 Late Report ViolationReport
Feb 05, 2022 Violations 902643 Late Report ViolationReport
Nov 16, 2021 Violations 878071 Enforcement Action PotentialReport
Nov 08, 2021 Enforcement actions 441958 TSO (Time Schedule Order) Historical
Jun 23, 2021 Annual reports 1064362 Annual report 2020 —
Jul 30, 2020 Enforcement actions 437020 NOV (Notice of Violation) Historical
Jul 30, 2020 Violations 873452 Incomplete/Insufficient SWPPP ViolationReport
Jul 15, 2020 Annual reports 981351 Annual report 2019 —
Jul 08, 2019 Annual reports 957657 Annual report 2018 —
Jun 22, 2018 Annual reports 943099 Annual report 2017 —
Jul 14, 2017 Annual reports 882617 Annual report 2016 —
Jul 13, 2016 Annual reports 842525 Annual report 2015 —

Sources and provenance

Sources behind this page
InformationSourceRetrieved or published
Permit, location, receiving-water textSMARTS Industrial Application Specific DataOct 20, 2026
Permit historySMARTS Storm Water ApplicationsOct 20, 2026
Monitoring resultsSMARTS Industrial Parameter DataOct 20, 2026
Watershed Boundary Dataset HU2 GeoPackages 15, 16, 18 (WBDHU12)USGS2026-10-22
2026 California Integrated Report, Appendix A: 2026 303(d) List (final)SWRCB2026-10-22
Final_2026_Rivers_and_Streams + Final_2026_Lakes_and_Reservoirs (FeatureServer 0)SWRCB GIS2026-10-22
SMARTS TMDL requirementsSMARTS2026-10-21

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

Records are shown as published and are not compliance determinations. How geographic context is derived.