A1 Grit Company
Active WDID 8 33I023531 Riverside, Riverside County Region 8 · Santa Ana
At a glance
- Permit Evidence: SMARTS record
- Active Industrial
- Notice of Intent (WDID code I) · Permits and applications
- Location Evidence: facility-reported
- Riverside, Riverside County
- Region 8 · Santa Ana · Location · Statewide map
- Receiving water
- Santa Ana River (as reported by the facility)
- Evidence: candidate, awaiting review 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
- 112 distinct results, 8 reporting years (2015 to 2023)
- Most recent sample Jan 22, 2024 · Monitoring
- Compliance and enforcement records Evidence: SMARTS record
- 3 inspections · 5 violation records · 5 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
- 33.987518, -117.352922
- Precision
- 6 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
- 1901 Massachusetts Ave, Riverside 92507
- Regional Water Board
- 8 — Santa Ana
HUC12 watershed Evidence: spatial
- East Etiwanda Creek-Santa Ana River HUC12 180702030804
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
- Louis Medina
- Primary industry (SIC)
- 1442-Construction Sand and Gravel
- Application ID
- 424701
- NOI processed
- Feb 29, 2012
- Last certified
- Jul 26, 2024
- Facility size
- 2.58 Acres
- Impervious area
- 70 %
Retrieved from SMARTS Oct 20, 2026. Verify against SMARTS before relying on it.
Permit history
| Application | Type | Status | Processed | Terminated | Certified |
|---|---|---|---|---|---|
| 424701 | Industrial | Active | Feb 29, 2012 | — | Jul 26, 2024 |
Every storm water application SMARTS records for this WDID, newest first (1).
Receiving water
- Reported by the facility Evidence: facility-reported
- Santa Ana River
- Discharges directly / indirectly
- Y / N (as answered in the permit application)
Evidence: not confirmed Evidence: candidate, awaiting review Awaiting review
Receiving-water text as reported by the discharger in SMARTS; no waterbody identification has been confirmed.
Why it is not confirmed (1)
- C1 name is only a prefix of official names
6 official waterbodies share this name; none is assigned without review.
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.
112 distinct measurements across 4 parameters, most recent sample Jan 22, 2024.
By reporting year
| Reporting year (July–June) | Distinct results | Parameters | With several versions | First sample | Last sample |
|---|---|---|---|---|---|
| 2023 | 8 | 4 | 0 | Jan 22, 2024 | Jan 22, 2024 |
| 2022 | 16 | 4 | 0 | Nov 08, 2022 | May 04, 2023 |
| 2021 | 16 | 4 | 0 | Oct 08, 2021 | Dec 14, 2021 |
| 2020 | 16 | 4 | 0 | Jan 29, 2021 | Mar 03, 2021 |
| 2019 | 16 | 4 | 0 | Dec 23, 2019 | Mar 10, 2020 |
| 2018 | 24 | 4 | 0 | Nov 29, 2018 | Feb 14, 2019 |
| 2016 | 8 | 4 | 0 | Dec 21, 2016 | Dec 21, 2016 |
| 2015 | 8 | 4 | 0 | Mar 07, 2016 | Mar 07, 2016 |
By parameter
| Parameter | Units | Measurements | Below detection | First sample | Last sample | Results |
|---|---|---|---|---|---|---|
| Nitrite Plus Nitrate (as N) | mg/L | 28 | 3 | Mar 07, 2016 | Jan 22, 2024 | Results |
| Oil and Grease | mg/L | 28 | 19 | Mar 07, 2016 | Jan 22, 2024 | Results |
| pH | SU | 28 | 0 | Mar 07, 2016 | Jan 22, 2024 | Results |
| Total Suspended Solids (TSS) | mg/L | 28 | 3 | Mar 07, 2016 | Jan 22, 2024 | Results |
All results (112 distinct rows)
| Sample date | Parameter | Result | Units | Location type | Event | Method | Report | Versions |
|---|---|---|---|---|---|---|---|---|
| Jan 22, 2024 | Nitrite Plus Nitrate (as N) | 5.9 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1279568 | |
| Jan 22, 2024 | Nitrite Plus Nitrate (as N) | 5.8 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1279568 | |
| Jan 22, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1279568 | |
| Jan 22, 2024 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1279568 | |
| Jan 22, 2024 | pH | 8 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1279568 | |
| Jan 22, 2024 | pH | 7 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1279568 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | 33 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1279568 | |
| Jan 22, 2024 | Total Suspended Solids (TSS) | 20 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1279568 | |
| May 04, 2023 | Nitrite Plus Nitrate (as N) | 4.1 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1237477 | |
| May 04, 2023 | Nitrite Plus Nitrate (as N) | 4.2 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1237477 | |
| May 04, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1237477 | |
| May 04, 2023 | Oil and Grease | ND | mg/L | Effluent | Qualifying Storm Event | E1664B | 1237477 | |
| May 04, 2023 | pH | 7.6 | SU | Effluent | Qualifying Storm Event | A4500HB | 1237477 | |
| May 04, 2023 | pH | 7.8 | SU | Effluent | Qualifying Storm Event | A4500HB | 1237477 | |
| May 04, 2023 | Total Suspended Solids (TSS) | 120 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1237477 | |
| May 04, 2023 | Total Suspended Solids (TSS) | 5 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1237477 | |
| Nov 08, 2022 | Nitrite Plus Nitrate (as N) | 5.8 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1218380 | |
| Nov 08, 2022 | Nitrite Plus Nitrate (as N) | 5.8 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1218380 | |
| Nov 08, 2022 | Oil and Grease | 1.6 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1218380 | |
| Nov 08, 2022 | Oil and Grease | 2.2 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1218380 | |
| Nov 08, 2022 | pH | 7.3 | SU | Effluent | Qualifying Storm Event | A4500HB | 1218380 | |
| Nov 08, 2022 | pH | 7.4 | SU | Effluent | Qualifying Storm Event | A4500HB | 1218380 | |
| Nov 08, 2022 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1218380 | |
| Nov 08, 2022 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1218380 | |
| Dec 14, 2021 | Nitrite Plus Nitrate (as N) | 5.1 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1174471 | |
| Dec 14, 2021 | Nitrite Plus Nitrate (as N) | 5 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1174471 | |
| Dec 14, 2021 | Oil and Grease | 9.6 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1174471 | |
| Dec 14, 2021 | Oil and Grease | 100 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1174471 | |
| Dec 14, 2021 | pH | 8 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1174471 | |
| Dec 14, 2021 | pH | 8.1 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1174471 | |
| Dec 14, 2021 | Total Suspended Solids (TSS) | 4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1174471 | |
| Dec 14, 2021 | Total Suspended Solids (TSS) | 4 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1174471 | |
| Oct 08, 2021 | Nitrite Plus Nitrate (as N) | 3.5 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1168774 | |
| Oct 08, 2021 | Nitrite Plus Nitrate (as N) | 3.5 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1168774 | |
| Oct 08, 2021 | Oil and Grease | DNQ 2.3 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1168774 | |
| Oct 08, 2021 | Oil and Grease | DNQ 1.9 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1168774 | |
| Oct 08, 2021 | pH | 7.9 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1168774 | |
| Oct 08, 2021 | pH | 7.9 | SU | Effluent | Qualifying Storm Event | pH_Paper | 1168774 | |
| Oct 08, 2021 | Total Suspended Solids (TSS) | 15 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1168774 | |
| Oct 08, 2021 | Total Suspended Solids (TSS) | 8 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1168774 | |
| Mar 03, 2021 | Nitrite Plus Nitrate (as N) | 4.3 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1145712 | |
| Mar 03, 2021 | Nitrite Plus Nitrate (as N) | 3.9 | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1145712 | |
| Mar 03, 2021 | Oil and Grease | 3.5 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1145712 | |
| Mar 03, 2021 | Oil and Grease | 2.8 | mg/L | Effluent | Qualifying Storm Event | E1664B | 1145712 | |
| Mar 03, 2021 | pH | 8 | SU | Effluent | Qualifying Storm Event | A4500HB | 1145712 | |
| Mar 03, 2021 | pH | 8 | SU | Effluent | Qualifying Storm Event | A4500HB | 1145712 | |
| Mar 03, 2021 | Total Suspended Solids (TSS) | ND | mg/L | Effluent | Qualifying Storm Event | A2540D | 1145712 | |
| Mar 03, 2021 | Total Suspended Solids (TSS) | 43 | mg/L | Effluent | Qualifying Storm Event | A2540D | 1145712 | |
| Jan 29, 2021 | Nitrite Plus Nitrate (as N) | ND | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1142411 | |
| Jan 29, 2021 | Nitrite Plus Nitrate (as N) | ND | mg/L | Effluent | Qualifying Storm Event | E300.0 | 1142411 |
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 | 5 | 5 Violation · 0 Potential (preliminary) · 0 Dismissed | Jul 01, 2013 – Jul 16, 2022 | Oct 21, 2026 | All violations |
| Enforcement actions | 5 | 4 issued · 0 draft · 1 withdrawn, rescinded or superseded | Jul 31, 2013 – Aug 11, 2022 | Oct 21, 2026 | All actions |
| Inspections | 3 | inspections, not findings | Apr 27, 2017 – Jun 21, 2022 | Oct 21, 2026 | All inspections |
| Annual reports | 10 | 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 (23 records, newest first)
| Date | Record | ID | Type or purpose | Status as published | Detail |
|---|---|---|---|---|---|
| Jul 07, 2026 | Annual reports | 1337845 | Annual report 2025 | — | |
| Jul 16, 2025 | Annual reports | 1296777 | Annual report 2024 | — | |
| Jul 20, 2023 | Annual reports | 1192138 | Annual report 2022 | — | |
| Aug 11, 2022 | Annual reports | 1115776 | Annual report 2021 | — | |
| Aug 11, 2022 | Enforcement actions | 446944 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Withdrawn | |
| Jul 16, 2022 | Violations | 882302 | Late Report | Violation | Report |
| Jun 21, 2022 | Enforcement actions | 446671 | Verbal Communication | Historical | |
| Jun 21, 2022 | Inspections | 2056415 | B Type compliance | Finalized | No Further Action |
| Jun 21, 2022 | Violations | 881889 | Incomplete/Insufficient SWPPP | Violation | Inspection |
| Jul 14, 2021 | Annual reports | 1063896 | Annual report 2020 | — | |
| Jul 01, 2020 | Annual reports | 980833 | Annual report 2019 | — | |
| Aug 16, 2019 | Annual reports | 957117 | Annual report 2018 | — | |
| Aug 08, 2019 | Enforcement actions | 433829 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 15, 2019 | Enforcement actions | 433519 | Verbal Communication | Historical | |
| Jul 15, 2019 | Violations | 870706 | Late Report | Violation | Report |
| Jul 11, 2019 | Violations | 870402 | Incomplete/Insufficient SWPPP | Violation | Inspection |
| Feb 15, 2019 | Inspections | 2043390 | B Type compliance | — | Follow-up Inspection Needed |
| Jul 20, 2018 | Annual reports | 942549 | Annual report 2017 | — | |
| Jul 13, 2017 | Annual reports | 882020 | Annual report 2016 | — | |
| Apr 27, 2017 | Inspections | 2033558 | B Type compliance | — | No Further Action |
| Jun 10, 2016 | Annual reports | 847896 | Annual report 2015 | — | |
| Jul 31, 2013 | Enforcement actions | 413483 | 1st NNC - AR (First Notice of Non-Compliance (annual report)) | Historical | |
| Jul 01, 2013 | Violations | 852192 | 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.