What is the address of Ulm WWTP?

The address on the plant’s EPA facility record is 0.5 Mi Sse Of City On Main St, Ulm, AR 72170, in Prairie County. Its coordinates are 34.5707, -91.4570. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Ulm WWTP treat?

Ulm WWTP treats an average of 0.0066 MGD and is permitted for a design flow of 0.05 MGD.

What treatment technology does Ulm WWTP use?

Klarifi has identified one treatment structure or unit process at the Ulm facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Ulm WWTP?

The facility discharges under NPDES permit AR0038008, currently administratively continued, expiring January 2026.

Is Ulm WWTP in compliance?

Discharge monitoring reports show 13 violations at Ulm WWTP in the last three years, 2 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Ulm WWTP and how do I contact them?

Ulm WWTP is a publicly owned treatment works in Ulm, Arkansas. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Ulm WWTP

0.5 Mi Sse Of City On Main St, Ulm, AR 72170 · Prairie County · Publicly Owned Treatment Works

Average flow: 0.0066 MGD

Design flow: 0.05 MGD

NPDES permit: AR0038008; Administratively continued

Permit expires: January 2026

Population served: 175; CWNS 2022

Ulm WWTP is a publicly owned wastewater treatment works in Ulm, Prairie County, Arkansas treating an average of 0.0066 million gallons per day against a permitted design capacity of 0.05 MGD, serving about 175 residents. It discharges under NPDES permit AR0038008 (administratively continued), which expires in January 2026, with 13 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Ulm WWTP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 13

Effluent violations: 2

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

Key contacts

Decision-makers at Ulm WWTP.

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Nearby wastewater treatment plants in Arkansas

Almyra WWTP

Almyra · 11 mi away

0.01 MGD

Clarendon WWTP

Clarendon · 11 mi away

0.19 MGD

Devalls Bluff, City Of

De Valls Bluff · 14 mi away

0.18 MGD

Holly Grove, City Of

Holly Grove · 15 mi away

0.01 MGD

Biscoe, City Of

Biscoe · 16 mi away

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Hazen WWTP

Hazen · 16 mi away

0.15 MGD

Humphrey, City Of - WWTP

Humphrey · 18 mi away

0.02 MGD

H.A.C.T. Regional WW Treatment Dist

Humnoke · 19 mi away

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Ulm WWTP: 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 24, 2026.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · FOG · Equalization tank · all terms

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