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Maryland / Sewer operators /

Town of Myersville (WWTP)

Wastewater treatment plant · Maryland · Myersville

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)
MD0020699
Wastewater outlets
None with locations in our records
Waters listed as receiving wastewater
Grindstone Run; Catoctin Creek
Tracked waters
Catoctin Creek, MD, Grindstone Run, MD
Discharge records counted
13 records · latest
Total reported volume in these records
12,161,360 gallons across the 11 records that give a volume (2 without one)

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 Town of Myersville (WWTP) or the state publishes its notices (check them for an alert sign-up):

Source: Town of Myersville (WWTP)'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

Treatment bypass: wastewater skips one or more treatment steps. Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater.

Reports linked to Town of Myersville (WWTP), newest first
WhenReportStatus
Water not mapped · 2868 Milt Summers Road · Bypass · 560,000 gallons report · noticereported
to 7:40 PMWater not mapped · service road behind 9629 Myersville Road · SSO · 300 gallons report · noticeended
to Jun 2, 6:25 AMGrindstone Run · 2868 Milt Summers Road · Bypass · 2.85 million gallons report · notice · mapended
to Mar 24, 8:00 AMGrindstone Run · 2868 Milt Summers Road · Bypass · 6.84 million gallons report · notice · mapended
to Nov 6 ’25, 3:25 PM“No streams around on side of hill. Goes into ground Unsure exactly what time it occurred, the town notified MES today 11/6/2025” · 9629 Myersville Road · SSO · 300 gallons report · notice · mapended
Catoctin Creek · 2868 milt summers road · Bypass · volume in each report mapreported
to May 9 ’25, 9:00 AMGrindstone Run · Milt Summers Road · Bypass · 188,000 gallons report · notice · mapended
to Apr 22 ’25, 1:45 PMGrindstone Run · 2868 Milt Summer Road · Bypass · 310,260 gallons report · notice · mapended
to 2:40 PM“All wastewater was absorbed back into the ground.” · 9629 Myersville Road · SSO · 102,600 gallons report · noticeended
to Apr 5 ’24, 3:15 PMGrindstone Run · 2868 Milt Summers Road · Bypass · 1.1 million gallons report · notice · mapended
to Mar 12 ’24, 2:40 PMGrindstone Run · 2868 Milt Summers Road · Bypass · 213,000 gallons report · notice · mapended
to 1:30 PM“N/A” · behind 9629 Myersville Road · SSO · 2,000 gallons report · notice · mapended

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.

Download these reports as CSV

All reports in Maryland by year: 2026 (4 from Town of Myersville (WWTP)) · 2025 (6 from Town of Myersville (WWTP)) · 2024 (2 from Town of Myersville (WWTP)) · 2023 (1 from Town of Myersville (WWTP))

Other sewer operators on these waters

The last 90 days

Last 90 days, hour by hour. Red: discharge or advisory reported. Amber: caution. Hatched amber: end not confirmed. Grey: no current status on the water outline. Purple hatching: source update overdue.

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 Town of Myersville (WWTP), last 12 months4December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
  • Days with a discharge reported by Town of Myersville (WWTP), last 12 months48December 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 Town of Myersville (WWTP)'s reports, last 12 months1,035December 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 (Town of Myersville (WWTP))6.4%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

13 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

No tracked source covers January 2022 to December 2022.

Source: md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.

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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

No tracked source covers January 2022 to December 2022. 2 discharge reports have no end time and are not marked ongoing; under DirtyWaterWatch rules they show caution, not a discharge or advisory status, and add no hours here. 1 discharge reported to last more than 31 days is counted as 31 days. 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.

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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

No tracked source covers January 2022 to December 2022.

Source: md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.

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Reported volume per year

Gallons (axis: K thousand, M million), summed from the 11 reports that gave a volume as a number (2 did not).

  • Incomplete source coverage
Limited records

2 of 13 discharge reports gave no volume as a number; only numbers are summed.

Source: md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.

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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
Limited records

2 discharge reports have no end time and are not marked ongoing; under DirtyWaterWatch rules they show caution, not a discharge or advisory status, and add no hours here. 1 discharge reported to last more than 31 days is counted as 31 days. 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.

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Share of the May to October season with a discharge or advisory status

Share of the hours from May 1 to October 31 with a discharge or advisory status under DirtyWaterWatch rules.

  • Discharge or advisory reported

2 discharge reports have no end time and are not marked ongoing; under DirtyWaterWatch rules they show caution, not a discharge or advisory status, and add no hours here. 1 discharge reported to last more than 31 days is counted as 31 days. 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.

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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.

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Reported discharges by wastewater outlet

Wastewater outlets with the most tracked discharge records: 7 of 7, 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.

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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