St. Mary's County Metropolitan Commission (MetCom)
Sewer utility · Maryland · Lexington Park, Leonardtown, California
Map sources: water outlines and launches from OpenBoatLaunch and OpenStreetMap contributors (Open Database License); wastewater outlets from EPA and state records; downstream estimates by DirtyWaterWatch using U.S. Geological Survey maps and flow data. Base map: OpenFreeMap and OpenMapTiles.
No outlet locations are in our records for this operator. Square boat markers mark boat launches listed by OpenBoatLaunch.
- Federal wastewater discharge permit (NPDES)
- MD0021679
- Wastewater outlets
- None with locations in our records
- Waters listed as receiving wastewater
- Herring Creek; St. Mary's River; Breton Bay
- Tracked waters
- Herring Creek, MD, St Marys River, MD, breton-bay-md, Penbrook Run, MD, Pine Hill Run, MD, Saint George Creek, MD, McIntosh Run, MD, Potomac River, MD
- Discharge records counted
- 30 records · latest
- Total reported volume in these records
- 198,890 gallons across the 30 records that give a volume
These totals reflect the records we track. Missing volumes and gaps in reporting limit comparisons between operators.
Sources: EPA ECHO and the operator and state sources linked below. Counts use the discharge records on this page. Updated 2026-11-03 08:50 UTC.
Public notices and alerts
Pages where St. Mary's County Metropolitan Commission (MetCom) or the state publishes its notices (check them for an alert sign-up):
Source: St. Mary's County Metropolitan Commission (MetCom)'s public notice and alert pages and the state's notification records.
Report a missing notice or error
Wastewater outlets
Outfall: a pipe or outlet where wastewater enters a water body.
Reports and advisories
Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater.
| When | Report | Status |
|---|---|---|
| to Sep 2, 10:00 AM | “Side ditch” · 21860 Rosebank Road · SSO · 75 gallons report · notice · map | ended |
| to 10:25 PM | “Road side ditch” · 18550 Peninsulas Court & Springer Rd · SSO · 7,500 gallons report · notice · map | ended |
| to 4:00 PM | “None, as the discharge was contained and pumped directly out of the contractor's test pit, therefore not affecting the surrounding area.” · 21268 Willows Rd · SSO · 1,078 gallons report · notice · map | ended |
| to 8:35 AM | Penbrook Run · 20540 Pershing Drive · SSO · 3,038 gallons report · notice · map | ended |
| to 2:30 PM | “Side ditch” · Directory across from 39680 Porpoise Creek Lane · SSO · 50 gallons report · notice | ended |
| to 11:00 AM | “side ditch” · 39921 Ben Morgan Rd · SSO · 50 gallons report · notice | ended |
| to 12:55 PM | Pine Hill Run · 48020 Pine Hill Run Road · SSO · 56,700 gallons report · notice · map | ended |
| to 12:30 PM | “Contained in ditch line.” · 20990 Point Look Out Road · SSO · 560 gallons report · notice | ended |
| to 10:00 AM | Saint George Creek · 16712 Piney Point Rd · SSO · 850 gallons report · notice · map | ended |
| to 10:30 PM | “N/A” · 17990 Piney Point Rd · SSO · 8,000 gallons report · notice | ended |
| to 11:00 AM | McIntosh Run · 26288 Point Lookout Rd · SSO · 5,000 gallons report · notice · map | ended |
| to 10:00 AM | “Storm drain manhole that lead to the Stormwater Pond” · Corner of Sara Ct & Fayre Drive · SSO · 24,500 gallons report · notice | ended |
| to Sep 17 ’25, 12:00 PM | “did not enter any water of State” · 21620 Spy Glass Way · SSO · 40 gallons report · notice | ended |
| to 3:15 PM | “Side ditch - did not reach any waterway or drain.” · 43765 Evergreen Way · SSO · 500 gallons report · notice · map | ended |
| to 2:30 PM | “Ditch line” · 22230 Meadow Lane · SSO · 3,889 gallons report · notice · map | ended |
| to 1:30 PM | Herring Creek · 19065 Piney Point Road · SSO · 6,630 gallons report · notice · map | ended |
| to 11:27 AM | “N/A” · 49888 Airedele Road · SSO · 1,250 gallons report · notice | ended |
| to 11:35 AM | Saint George Creek · 45105 Deagles Boatyard Road · SSO · 250 gallons report · notice · map | ended |
| to 12:30 PM | “N/A” · 21745 Newtowne Neck Rd · SSO · 200 gallons report · notice | ended |
| to 5:18 PM | “N/A” · 39870 Combs Road · SSO · 750 gallons report · notice | ended |
| to 2:00 PM | Saint George Creek · 45105 Deagles Boatyard Road · SSO · 7,500 gallons report · notice · map | ended |
| to Oct 4 ’24, 12:00 PM | “The area which received the overflow was a dry, contained drainage ditch area, Located near to the above-referenced address. This are is not designated as shellfish waters and is not a public drinking water supply.” · 21091 Winding Way · SSO · 1,200 gallons report · notice · map | ended |
| to 10:45 AM | “The overflow of raw sewage from the manhole ran into a blue line stream (ID# 54003176) as marked on St Mary's County Government GIS website.” · 44521 White Pine Ct · SSO · 4,000 gallons report · notice · map | ended |
| to 10:30 AM | Saint George Creek · 18000 Piney Point Rd · SSO · 1,000 gallons report · notice · map | ended |
| to 11:00 PM | “N/A” · 1800o Piney Point Road · SSO · 3,740 gallons report · notice | ended |
Sources: MDE Reported Sewer Overflows (New for 2023), Maryland Open Data Portal (Socrata stgj-u72u), retrieved 2026-11-03 08:17 UTC. A report's record id and times show when you hover or focus its "report" link.
Showing the latest 25 records of 30 records.See them all with filters.
All reports in Maryland by year: 2026 (11 from St. Mary's County Metropolitan Commission (MetCom)) · 2025 (10 from St. Mary's County Metropolitan Commission (MetCom)) · 2024 (5 from St. Mary's County Metropolitan Commission (MetCom)) · 2023 (4 from St. Mary's County Metropolitan Commission (MetCom))
Other sewer operators on these waters
- St Marys River, MD: U.S. Navy installations (Annapolis, Indian Head, Patuxent River)
- Potomac River, MD: Charles County Department of Public Works (Mattawoman WWTP), District of Columbia Water and Sewer Authority (DC Water), Mayor and City Council of Cumberland (Water Reclamation Facility and combined sewer system), Town of Hancock, Washington County Department of Water Quality, WSSC Water (Washington Suburban Sanitary Commission), Allegany County Department of Public Works (CSO collection system and North Branch / Georges Creek sewers), Town of Westernport (former CSO permit), Maryland Water Service Utilities (Allegany County), U.S. Navy installations (Annapolis, Indian Head, Patuxent River)
The last 90 days
No discharge, advisory or caution periods are shown for the waters this sewer operator's reports were placed on in this time span. Check downstream stretches and source coverage.
Source: DirtyWaterWatch calculations using the reports named above and the published status rules. Updated 2026-11-03 08:50 UTC.
Reported discharges over time
- Discharges reported by St. Mary's County Metropolitan Commission (MetCom), last 12 months11December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
- Days with a discharge reported by St. Mary's County Metropolitan Commission (MetCom), last 12 months11December 2025 to November 2026A day counts once however many discharges were under way on it. Verified reports where available, else notices; revisions and duplicates counted once.
- Hours with a discharge or advisory status from St. Mary's County Metropolitan Commission (MetCom)'s reports, last 12 months35December 2025 to November 2026Red hours by the map's rules: each discharge to its reported end plus the state's post-discharge period; overlapping hours count once.
- 2026 season with a discharge or advisory status (St. Mary's County Metropolitan Commission (MetCom))0.6%May to October 2026Share of May 1 to October 31 hours with red status by the map's rules, of the hours a source covered.
Combined sewer overflow (CSO): sewage mixed with rainwater spills from a shared sewer system. Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater. Treatment bypass: wastewater skips one or more treatment steps. Blended discharge: wastewater that skipped some treatment is mixed with treated wastewater. Outfall: a pipe or outlet where wastewater enters a water body.
Reported discharges per month
30 reported discharges, January 2022 to November 2026.
- Combined sewer overflow
- Sanitary sewer overflow
- Treatment bypass, blended or other
- No tracked source for this period
- Incomplete source coverage
No tracked source covers January 2022 to December 2022.
Source: md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.
Show table
| Month | Combined sewer overflow | Sanitary sewer overflow | Treatment bypass, blended or other | Total | Counted from | Coverage |
|---|---|---|---|---|---|---|
| January 2022 | 0 | 0 | 0 | 0 | No tracked source for this period | |
| February 2022 | 0 | 0 | 0 | 0 | No tracked source for this period | |
| March 2022 | 0 | 0 | 0 | 0 | No tracked source for this period | |
| April 2022 | 0 | 0 | 0 | 0 | No tracked source for this period | |
| May 2022 | 0 | 0 | 0 | 0 | No tracked source for this period | |
| June 2022 | 0 | 0 | 0 | 0 | No tracked source for this period | |
| July 2022 | 0 | 0 | 0 | 0 | No tracked source for this period | |
| August 2022 | 0 | 0 | 0 | 0 | No tracked source for this period | |
| September 2022 | 0 | 0 | 0 | 0 | No tracked source for this period | |
| October 2022 | 0 | 0 | 0 | 0 | No tracked source for this period | |
| November 2022 | 0 | 0 | 0 | 0 | No tracked source for this period | |
| December 2022 | 0 | 0 | 0 | 0 | No tracked source for this period | |
| January 2023 | 0 | 0 | 0 | 0 | Incomplete source coverage | |
| February 2023 | 0 | 0 | 0 | 0 | ||
| March 2023 | 0 | 0 | 0 | 0 | ||
| April 2023 | 0 | 0 | 0 | 0 | ||
| May 2023 | 0 | 0 | 0 | 0 | ||
| June 2023 | 0 | 1 | 0 | 1 | Source records | |
| July 2023 | 0 | 1 | 0 | 1 | Source records | |
| August 2023 | 0 | 1 | 0 | 1 | Source records | |
| September 2023 | 0 | 0 | 0 | 0 | ||
| October 2023 | 0 | 1 | 0 | 1 | Source records | |
| November 2023 | 0 | 0 | 0 | 0 | ||
| December 2023 | 0 | 0 | 0 | 0 | ||
| January 2024 | 0 | 0 | 0 | 0 | ||
| February 2024 | 0 | 1 | 0 | 1 | Source records | |
| March 2024 | 0 | 0 | 0 | 0 | ||
| April 2024 | 0 | 0 | 0 | 0 | ||
| May 2024 | 0 | 0 | 0 | 0 | ||
| June 2024 | 0 | 3 | 0 | 3 | Source records | |
| July 2024 | 0 | 0 | 0 | 0 | ||
| August 2024 | 0 | 0 | 0 | 0 | ||
| September 2024 | 0 | 0 | 0 | 0 | ||
| October 2024 | 0 | 1 | 0 | 1 | Source records | |
| November 2024 | 0 | 0 | 0 | 0 | ||
| December 2024 | 0 | 0 | 0 | 0 | ||
| January 2025 | 0 | 1 | 0 | 1 | Source records | |
| February 2025 | 0 | 3 | 0 | 3 | Source records | |
| March 2025 | 0 | 1 | 0 | 1 | Source records | |
| April 2025 | 0 | 0 | 0 | 0 | ||
| May 2025 | 0 | 0 | 0 | 0 | ||
| June 2025 | 0 | 2 | 0 | 2 | Source records | |
| July 2025 | 0 | 0 | 0 | 0 | ||
| August 2025 | 0 | 1 | 0 | 1 | Source records | |
| September 2025 | 0 | 1 | 0 | 1 | Source records | |
| October 2025 | 0 | 0 | 0 | 0 | ||
| November 2025 | 0 | 1 | 0 | 1 | Source records | |
| December 2025 | 0 | 0 | 0 | 0 | ||
| January 2026 | 0 | 2 | 0 | 2 | Source records | |
| February 2026 | 0 | 3 | 0 | 3 | Source records | |
| March 2026 | 0 | 3 | 0 | 3 | Source records | |
| April 2026 | 0 | 0 | 0 | 0 | ||
| May 2026 | 0 | 0 | 0 | 0 | ||
| June 2026 | 0 | 1 | 0 | 1 | Source records | |
| July 2026 | 0 | 0 | 0 | 0 | ||
| August 2026 | 0 | 1 | 0 | 1 | Source records | |
| September 2026 | 0 | 1 | 0 | 1 | Source records | |
| October 2026 | 0 | 0 | 0 | 0 | ||
| November 2026 | 0 | 0 | 0 | 0 |
Hours with a discharge or advisory status per month
Hours when a water had a discharge or advisory status from this sewer operator's reports, under DirtyWaterWatch rules.
- Discharge or advisory reported
- No tracked source for this period
- Incomplete source coverage
No tracked source covers January 2022 to December 2022. Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.
Source: md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.
Show table
| Month | Hours with a discharge or advisory status | Hours from post-discharge periods | Hours in the month | Coverage |
|---|---|---|---|---|
| January 2022 | 0 | 0 | 744 | No tracked source for this period |
| February 2022 | 0 | 0 | 672 | No tracked source for this period |
| March 2022 | 0 | 0 | 744 | No tracked source for this period |
| April 2022 | 0 | 0 | 720 | No tracked source for this period |
| May 2022 | 0 | 0 | 744 | No tracked source for this period |
| June 2022 | 0 | 0 | 720 | No tracked source for this period |
| July 2022 | 0 | 0 | 744 | No tracked source for this period |
| August 2022 | 0 | 0 | 744 | No tracked source for this period |
| September 2022 | 0 | 0 | 720 | No tracked source for this period |
| October 2022 | 0 | 0 | 744 | No tracked source for this period |
| November 2022 | 0 | 0 | 720 | No tracked source for this period |
| December 2022 | 0 | 0 | 744 | No tracked source for this period |
| January 2023 | 0 | 0 | 744 | Incomplete source coverage |
| February 2023 | 0 | 0 | 672 | |
| March 2023 | 0 | 0 | 744 | |
| April 2023 | 0 | 0 | 720 | |
| May 2023 | 0 | 0 | 744 | |
| June 2023 | 2 | 2 | 720 | |
| July 2023 | 1 | 1 | 744 | |
| August 2023 | 1 | 1 | 744 | |
| September 2023 | 0 | 0 | 720 | |
| October 2023 | 2 | 2 | 744 | |
| November 2023 | 0 | 0 | 720 | |
| December 2023 | 0 | 0 | 744 | |
| January 2024 | 0 | 0 | 744 | |
| February 2024 | 4 | 4 | 696 | |
| March 2024 | 0 | 0 | 744 | |
| April 2024 | 0 | 0 | 720 | |
| May 2024 | 0 | 0 | 744 | |
| June 2024 | 6 | 6 | 720 | |
| July 2024 | 0 | 0 | 744 | |
| August 2024 | 0 | 0 | 744 | |
| September 2024 | 0 | 0 | 720 | |
| October 2024 | 18 | 18 | 744 | |
| November 2024 | 0 | 0 | 720 | |
| December 2024 | 0 | 0 | 744 | |
| January 2025 | 2 | 2 | 744 | |
| February 2025 | 9 | 9 | 672 | |
| March 2025 | 1 | 1 | 744 | |
| April 2025 | 0 | 0 | 720 | |
| May 2025 | 0 | 0 | 744 | |
| June 2025 | 16 | 16 | 720 | |
| July 2025 | 0 | 0 | 744 | |
| August 2025 | 2 | 2 | 744 | |
| September 2025 | 27 | 27 | 720 | |
| October 2025 | 0 | 0 | 744 | |
| November 2025 | 3 | 3 | 720 | |
| December 2025 | 0 | 0 | 744 | |
| January 2026 | 3 | 3 | 744 | |
| February 2026 | 5 | 5 | 672 | |
| March 2026 | 3 | 3 | 744 | |
| April 2026 | 0 | 0 | 720 | |
| May 2026 | 0 | 0 | 744 | |
| June 2026 | 2 | 2 | 720 | |
| July 2026 | 0 | 0 | 744 | |
| August 2026 | 5 | 5 | 744 | |
| September 2026 | 17 | 17 | 720 | |
| October 2026 | 0 | 0 | 744 | |
| November 2026 | 0 | 0 | 53 |
Days with a reported discharge per month
A day counts when any counted discharge was under way on it, from its start to its reported end in Eastern Time; a report with no end counts its start day.
- No tracked source for this period
- Incomplete source coverage
No tracked source covers January 2022 to December 2022.
Source: md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.
Show table
| Month | Days with a reported discharge | Coverage |
|---|---|---|
| January 2022 | 0 | No tracked source for this period |
| February 2022 | 0 | No tracked source for this period |
| March 2022 | 0 | No tracked source for this period |
| April 2022 | 0 | No tracked source for this period |
| May 2022 | 0 | No tracked source for this period |
| June 2022 | 0 | No tracked source for this period |
| July 2022 | 0 | No tracked source for this period |
| August 2022 | 0 | No tracked source for this period |
| September 2022 | 0 | No tracked source for this period |
| October 2022 | 0 | No tracked source for this period |
| November 2022 | 0 | No tracked source for this period |
| December 2022 | 0 | No tracked source for this period |
| January 2023 | 0 | Incomplete source coverage |
| February 2023 | 0 | |
| March 2023 | 0 | |
| April 2023 | 0 | |
| May 2023 | 0 | |
| June 2023 | 1 | |
| July 2023 | 1 | |
| August 2023 | 1 | |
| September 2023 | 0 | |
| October 2023 | 1 | |
| November 2023 | 0 | |
| December 2023 | 0 | |
| January 2024 | 0 | |
| February 2024 | 1 | |
| March 2024 | 0 | |
| April 2024 | 0 | |
| May 2024 | 0 | |
| June 2024 | 3 | |
| July 2024 | 0 | |
| August 2024 | 0 | |
| September 2024 | 0 | |
| October 2024 | 2 | |
| November 2024 | 0 | |
| December 2024 | 0 | |
| January 2025 | 1 | |
| February 2025 | 3 | |
| March 2025 | 1 | |
| April 2025 | 0 | |
| May 2025 | 0 | |
| June 2025 | 2 | |
| July 2025 | 0 | |
| August 2025 | 1 | |
| September 2025 | 2 | |
| October 2025 | 0 | |
| November 2025 | 1 | |
| December 2025 | 0 | |
| January 2026 | 2 | |
| February 2026 | 3 | |
| March 2026 | 2 | |
| April 2026 | 0 | |
| May 2026 | 0 | |
| June 2026 | 1 | |
| July 2026 | 0 | |
| August 2026 | 1 | |
| September 2026 | 2 | |
| October 2026 | 0 | |
| November 2026 | 0 |
Reported volume per year
Gallons (axis: K thousand, M million), summed from the 30 reports that gave a volume as a number.
- Incomplete source coverage
Source: md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.
Show table
| Year | Reported volume, gallons | Reports with a volume | Reports without a volume | Coverage |
|---|---|---|---|---|
| 2023 | 17,470 | 4 | 0 | Incomplete source coverage |
| 2024 | 53,010 | 5 | 0 | |
| 2025 | 45,509 | 10 | 0 | |
| 2026 | 82,901 | 11 | 0 |
Hours with a discharge or advisory status per year
Hours with a discharge or advisory status each year under DirtyWaterWatch rules; 2026 to date.
- Discharge or advisory reported
- Incomplete source coverage
Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.
Source: md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.
Show table
| Year | Hours with a discharge or advisory status | Share of the year | Coverage |
|---|---|---|---|
| 2023 | 6 | 0.1% | Incomplete source coverage |
| 2024 | 28 | 0.3% | |
| 2025 | 60 | 0.7% | |
| 2026 | 35 | 0.5% |
Reported discharges by calendar month, all years
Every counted discharge report, by the calendar month it began.
Months are summed over every year a tracked source covers; the table gives the number of years behind each month.
Source: md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.
Show table
| Month | Reported discharges | Years of records |
|---|---|---|
| January | 3 | 4 |
| February | 7 | 4 |
| March | 4 | 4 |
| April | 0 | 4 |
| May | 0 | 4 |
| June | 7 | 4 |
| July | 1 | 4 |
| August | 3 | 4 |
| September | 2 | 4 |
| October | 2 | 4 |
| November | 1 | 4 |
| December | 0 | 3 |
Reported discharges by wastewater outlet
Wastewater outlets with the most tracked discharge records: 10 of 28, all years. Counts depend on reporting coverage and do not measure legal compliance or harm.
Source: md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.
Show table
| Wastewater outlet | Reported discharges |
|---|---|
| 45105 Deagles Boatyard Road | 2 |
| 18550 Peninsulas Court & Springer Rd. | 2 |
| 21860 Rosebank Road | 1 |
| 18550 Peninsulas Court & Springer Rd | 1 |
| 21268 Willows Rd | 1 |
| 20540 Pershing Drive | 1 |
| Directory across from 39680 Porpoise Creek Lane | 1 |
| 39921 Ben Morgan Rd | 1 |
| 48020 Pine Hill Run Road | 1 |
| 20990 Point Look Out Road | 1 |
| Other outlets (18) | 18 |
How these charts are counted
We count each discharge once. Where a source publishes notices and confirmed reports, we use confirmed reports for an operator's month when available; otherwise we use notices. We combine revisions and exclude duplicate state reports copied by the U.S. Environmental Protection Agency (EPA). Monthly and yearly totals appear separately. Status hours follow this site's rules. Shaded gaps mean missing coverage, not zero discharges.
- md-mde-overflows: records from January 4, 2023 to the latest update