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Sanitary sewer overflow (SSO) reported — Baltimore County DPW, Sep 18, 2026

Ended (as reported) · Baltimore County DPW

Source: Baltimore County DPW via MDE Reported Sewer Overflows (New for 2023), Maryland Open Data Portal (Socrata stgj-u72u), record mdc121555-20260918T1226-410-key-hwy, 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: Baltimore County DPW. Outlet: “410 Key Highway”. Location: 39.27630, -76.64440; 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: “Northwest Harbor”. DirtyWaterWatch links this report to Northwest Harbor, MD. Match basis: the water named in the report.

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

Sep 18, 2026, 12:26 PM EDT

Ended

Sep 18, 2026, 2:49 PM 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

Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater.

Status in the record

Ended (as reported)

Material

not stated

Volume

143 gallons (not stated whether estimated or measured)

Volume as reported

“143 gallons”

Advice from Baltimore County DPW

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

Status history from this report

• Discharge or advisory reported Northwest Harbor: Discharge reported ongoing, Sep 18, 2026, 12:26 PM EDT to Sep 18, 2026, 2:49 PM EDT
• Caution Northwest Harbor: Within the caution period after the reported end, Sep 18, 2026, 2:49 PM EDT to Sep 21, 2026, 2:49 PM EDT

Source: DirtyWaterWatch calculations using this report and the published status rules. Updated 2026-11-03 02:43 UTC.

Source and versions

Source

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

Source record number

mdc121555-20260918T1226-410-key-hwy

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "row": {
    "overflow_type": "SSO",
    "facility_collection_system": "Back River WWTP Collection System - Baltimore County",
    "npdes_no": "MDC121555",
    "start_date": "09/18/2026",
    "start_time": "12:26:00",
    "duration_day": "0",
    "duration_hour": "2",
    "duration_minute": "23",
    "overflow_address": "410 Key Highway",
    "zip": "21230",
    "owner_name": "Baltimore County DPW",
    "discharge_volume": "143",
    "overflow_cause": "Main line clogged with grease, rags and trash.",
    "receiving_water": "Northwest Harbor",
    "county": "Baltimore",
    "penalty_id": "",
    "overflow_latitude": "39.2763",
    "overflow_longitude": "-76.6444",
    "id": "76"
  },
  "_ended_at_basis": "start + duration_day/hour/minute",
  "_coords": "as given",
  "_water": {
    "name_notes": [
      "'northwest harbor': the point is not near any of the 1 Maryland waters with this name: not used"
    ],
    "why_none": "no Maryland water record matched the name"
  },
  "_discharger_basis": "permit/system id MDC121555",
  "_first_seen_at": "2026-11-03T02:28:49Z"
}