What is the address of Lynden STP?

The address on the plant’s EPA facility record is 800 S 6th St, Lynden, WA 98264, in Whatcom County. Its coordinates are 48.9384, -122.4518. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Lynden STP treat?

Lynden STP treats an average of 1.56 MGD.

What treatment technology does Lynden STP use?

Klarifi has identified 4 treatment structures and unit processes at the Lynden facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Lynden STP?

The facility discharges under NPDES permit WA0022578, currently administratively continued, expiring October 2022.

Is Lynden STP in compliance?

Discharge monitoring reports show 6 violations at Lynden STP in the last three years, 6 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Lynden STP and how do I contact them?

Lynden STP is a publicly owned treatment works in Lynden, Washington. Klarifi lists 2 verified decision-maker contacts for this facility, available with a free trial.

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Lynden STP

800 S 6th St, Lynden, WA 98264 · Whatcom County · Publicly Owned Treatment Works

Average flow: 1.56 MGD

Design flow: —

NPDES permit: WA0022578; Administratively continued

Permit expires: October 2022

Population served: 13,805; CWNS 2022

Lynden STP is a publicly owned wastewater treatment works in Lynden, Whatcom County, Washington treating an average of 1.56 million gallons per day, serving about 13,805 residents. It discharges under NPDES permit WA0022578 (administratively continued), which expires in October 2022, with 6 recorded violations in the last three years.

Treatment technology

4 treatment structures and unit processes identified at Lynden STP.

Available with a free Klarifi account

See the full treatment train at Lynden STP: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 6

Effluent violations: 6

Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.

Key contacts

2 verified contacts for Lynden STP, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Lynden STP, plus the full compliance history and discharge data.

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Everson WWTP

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Ferndale STP

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Lighthouse Point Water Reclamation Facility

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Post Point Plant

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Larrabee State Park

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Sedro Woolley City Of

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Lynden STP: frequently asked questions

Sources and methodology

Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.

Data refreshed October 26, 2026; facility record last updated July 3, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms

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