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Treatment bypass reported — Maryland Environmental Service, Jul 10, 2026

Ended (as reported) · Maryland Environmental Service

Source: Maryland Environmental Service via MDE Reported Sewer Overflows (New for 2023), Maryland Open Data Portal (Socrata stgj-u72u), record md0063207-20260710T2000-7938-rockbridge-rd, updated by the source Nov 2, 2026, 10:55 AM EST, retrieved 2026-11-03 02:31 UTC · Read the original notice

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1. Reported wastewater outlet

Operator named in the record: Maryland Environmental Service (federal wastewater discharge permit, NPDES, MD0063207). Outlet: “7938 Rockbridge Rd”. Location: 39.13410, -76.77680; location source: given in the source record.

Outfall: a pipe or outlet where wastewater enters a water body.

2. Waters named in the notice

The notice names: “Dorsey Run”. Not linked to a mapped water.

3. Estimated downstream stretch

We estimate routes only on rivers before they become tidal. We do not estimate routes through tidal water or lakes.

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When it happened and when it was reported

Event and notice times use Eastern Time (EST or EDT). Retrieval times use Coordinated Universal Time (UTC).

Started

Jul 10, 2026, 8:00 PM EDT

Ended

Jul 11, 2026, 11:30 AM EDT

Detail provided by the source

Times known to the minute

Reported to the source

not given

Published

not given

Source last updated

Nov 2, 2026, 10:55 AM EST

Last retrieved by DirtyWaterWatch

2026-11-03 02:31 UTC

What and how much

Type

Treatment bypass: wastewater skips one or more treatment steps.

Status in the record

Ended (as reported)

Material

not stated

Volume

320,000 gallons (not stated whether estimated or measured)

Volume as reported

“320000 gallons”

Advice from Maryland Environmental Service

This report includes no advice. Check current local health notices.

Advice period

This report does not state a period. See the rule DirtyWaterWatch applies and its source.

Basis

not stated

Source and versions

Source

MDE Reported Sewer Overflows (New for 2023), Maryland Open Data Portal (Socrata stgj-u72u)

Source record number

md0063207-20260710T2000-7938-rockbridge-rd

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "row": {
    "overflow_type": "Bypass",
    "facility_collection_system": "DORSEY RUN ADVANCED WWTP",
    "npdes_no": "MD0063207",
    "start_date": "07/10/2026",
    "start_time": "20:00:00",
    "duration_day": "0",
    "duration_hour": "15",
    "duration_minute": "30",
    "overflow_address": "7938 Rockbridge Rd",
    "zip": "20794",
    "owner_name": "Maryland Environmental Service",
    "discharge_volume": "320000",
    "overflow_cause": "Due to heavy rainfall, partially treated wastewater bypassed the sand filters before being discharged. The discharge was still disinfected.",
    "receiving_water": "Dorsey Run",
    "county": "Anne Arundel",
    "penalty_id": "",
    "overflow_latitude": "39.1341",
    "overflow_longitude": "-76.7768",
    "id": "236"
  },
  "_ended_at_basis": "start + duration_day/hour/minute",
  "_coords": "as given",
  "_water": {
    "why_none": "no Maryland water record matched the name"
  },
  "_discharger_basis": "owner name",
  "_first_seen_at": "2026-11-03T02:28:49Z"
}