Reports /

Cyanobacteria advisory (harmful blue-green algae) reported, Aug 24, 2026

Advisory active · NJDEP Harmful Algal Bloom Program (Division of Water Monitoring, Standards and Pesticide Control)

Source: NJDEP Harmful Algal Bloom Program (Division of Water Monitoring, Standards and Pesticide Control), record 0198fe45-e4e7-4117-ba3f-29b2fc933971, updated by the source Aug 24, 2026, 10:38 AM EDT, retrieved 2026-11-02 21:19 UTC · Read the original notice

Read the original notice · Report an error

1. Reported wastewater outlet

Operator named in the record: not named. Outlet: not stated. Location: 40.04066, -74.10290; 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: “Greenwood Lake”. 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

Aug 24, 2026, 10:38 AM EDT

Ended

not reported

Detail provided by the source

Times known to the minute

Reported to the source

not given

Published

not given

Source last updated

Aug 24, 2026, 10:38 AM EDT

Last retrieved by DirtyWaterWatch

2026-11-02 21:19 UTC

What and how much

Type

Cyanobacteria (harmful blue-green algae) can make water unfit for contact; the issuing authority decides when its advisory ends.

Status in the record

Advisory active

Material

not stated

Volume

volume not reported (not stated whether estimated or measured)

Volume as reported

none

Advice from NJDEP Harmful Algal Bloom Program (Division of Water Monitoring, Standards and Pesticide Control)

“NJDEP HAB alert tier at this site: Watch.”

Advice period

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

Basis

NJDEP HAB Dashboard: the current alert at a site is its latest sample's tier (HAB Watch, Advisory, Warning, Danger); no fixed window

Status history from this report

• Discharge or advisory reported a water not yet on the map: Official advisory in effect, Aug 24, 2026, 10:38 AM EDT to Sep 7, 2026, 10:38 AM EDT
• No current status shown a water not yet on the map: Advisory not re-confirmed by its source recently, Sep 7, 2026, 10:38 AM EDT to Nov 22, 2026, 9:38 AM EST

Source: DirtyWaterWatch calculations using this report and the published status rules. Updated 2026-11-02 21:26 UTC.

Source and versions

Source

Division of Water Monitoring, Standards and Pesticide Control

Source record number

0198fe45-e4e7-4117-ba3f-29b2fc933971

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "waterbody": "Greenwood Lake",
  "site_id": "03730 Lakeside Community Club Beach",
  "municipality": "West Milford Township",
  "county": "Passaic",
  "bathing_beach": "No",
  "visits": [
    {
      "objectid": 2795,
      "sitevisitdate": "2026-08-24T10:38:00-04:00",
      "siteid": "03730 Lakeside Community Club Beach",
      "advisorytier": "Watch",
      "advistorytrigdt": "2026-09-10T08:00:00-04:00",
      "algaeobserved": "Yes",
      "cellct": 44125,
      "microcystins": 1.131,
      "cylindrospermopsin": null,
      "anatoxin": null,
      "saxitoxin": null,
      "predomtaxa": "Phormidium",
      "toxinpresent": null,
      "comments": "Dead fish washed up on shore",
      "EditDate": "2026-09-09T13:20:45-04:00"
    }
  ],
  "credit": "NJDEP HAB Dashboard (provided for information purposes only; not monitored 24/7)",
  "current_tier": "Watch",
  "highest_tier": "Watch",
  "last_confirmed_basis": "sample time"
}