Massachusetts / Events /

Combined sewer overflow: LYNN WATER & SEWER COMMISSION, Oct 11, 2026

Ended (as reported) · LYNN WATER & SEWER COMMISSION (MassDEP sewage notification portal)

Source: LYNN WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 78dd2358-1eba-4589-8cb5-a29681a50da3, published Oct 12, 2026, 9:12 AM EDT, retrieved 2026-11-02 11:54 UTC · notice

1. The reported outfall

Outfall reported by LYNN WATER & SEWER COMMISSION (MA0100552 outfall LYNN005): “180 LYNNWAY”. Location: 42.45979, -70.94464, from the state's or EPA's outfall layer.

2. Waters named in the notice

The notice names: “LYNN HARBOR”. We place it on Lynn Harbor, MA. Matched by the name of the water in the source record.

3. Modeled downstream reach

Not modeled: the reach model runs on rivers above the head of tide only.

Open on the main map

When: three different times

The time of the event, the time the source reported, published or updated it, and the time we fetched it are kept apart. Times are shown in New England time; the record keeps the original offsets.

Started

Oct 11, 2026, 7:50 PM EDT

Ended

not reported

Precision

Known to the minute

Reported to the source

not given

Published

Oct 12, 2026, 9:12 AM EDT

Source last updated

not given

We fetched it

2026-11-02 11:54 UTC

What and how much

Type

Combined sewer overflow

Status in the record

Ended (as reported)

Material

“CSO – UnTreated”

Volume

not reported (not stated whether estimated or measured)

Volume in the source's words

none

Advice

“Avoid contact with these water bodies for 48 hours after the discharge or overflow ceases due to increased health risks from bacteria and other pollutants. See website for more information on whether specific resource areas, such as bathing beaches, are affected.”

Advice window

48 hours

Basis

314 CMR 16.04(10)(g)

What it does to the map, over time

• Caution Lynn Harbor: Discharge record with no status and no reported end, Oct 11, 2026, 7:50 PM EDT to Oct 26, 2026, 9:12 AM EDT
• Unresolved: no end reported Lynn Harbor: Unresolved: no end reported, Oct 26, 2026, 9:12 AM EDT to Nov 11, 2026, 8:12 AM EST
• No current report Lynn Harbor: Unresolved: no end reported (off the map after 30 days), Nov 11, 2026, 8:12 AM EST to Jan 9, 2027, 6:50 PM EST

Source: intervals computed by DirtyWaterWatch (build/status.py) from this record and the rules on the methods page, as of 2026-11-02 11:56 UTC.

Source and revisions

Source

MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/)

Record id at the source

78dd2358-1eba-4589-8cb5-a29681a50da3

Original notice

https://eeaonline.eea.state.ma.us/portal/dep/cso-data-portal/detail…

Revision of

none (first record)

Revised by

no later revision

{
  "incidentId": "78dd2358-1eba-4589-8cb5-a29681a50da3",
  "incidentNumber": "26017753",
  "incidentDate": "2026-10-11T00:00:00",
  "incidentTime": "19:50",
  "amPm": null,
  "reporterClass": "Public Notification Report",
  "eventType": "CSO – UnTreated",
  "permiteeClass": "CSO",
  "permiteeName": "LYNN WATER & SEWER COMMISSION",
  "permiteeId": "MA0100552",
  "outfallId": "LYNN005",
  "municipality": "LYNN",
  "reportingType": "Initial-Ceased",
  "location": "180 LYNNWAY",
  "latitude": null,
  "longitude": null,
  "waterBody": "LYNN HARBOR",
  "waterBodyDescription": null,
  "volumnOfEvent": "",
  "rainfallData": "",
  "hours": "",
  "minutes": "",
  "month": null,
  "year": null,
  "additionalInformation": null,
  "submittedDate": "2026-10-12T09:12:36.443",
  "parentIncidentId": null,
  "_report_class": "Public Notification Report",
  "_tz_assumed": "America/New_York (portal gives local clock time without zone)",
  "_ended_note": "reported ceased; the portal gives no cessation time",
  "_coords": "MassDEP CSOs layer DEP_OUTFL_ LYNN005 (locations are estimates)",
  "_water": {
    "via": "crosswalk on portal waterbody",
    "text": "LYNN HARBOR",
    "confidence": "high"
  },
  "_advice_source": "required wording of 314 CMR 16.04(10)(g); the permittee's own advisory is only in an attachment the portal will not serve"
}