What is the address of Diaz WWTP?

The address on the plant’s EPA facility record is Anna Rd, Diaz, AR 72043, in Jackson County. Its coordinates are 35.6455, -91.2372. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Diaz WWTP treat?

Diaz WWTP is permitted for a design flow of 0.23 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does Diaz WWTP use?

Klarifi has identified 2 treatment structures and unit processes at the Diaz facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Diaz WWTP?

The facility discharges under NPDES permit AR0041033, currently effective, expiring October 2027.

Is Diaz WWTP in compliance?

Discharge monitoring reports show 5 violations at Diaz WWTP in the last three years, 5 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Diaz WWTP and how do I contact them?

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

Try for free Log in

Diaz WWTP

Anna Rd, Diaz, AR 72043 · Jackson County · Publicly Owned Treatment Works

Average flow: —

Design flow: 0.23 MGD

NPDES permit: AR0041033; Effective

Permit expires: October 2027

Population served: 1,248; CWNS 2022

Diaz WWTP is a publicly owned wastewater treatment works in Diaz, Jackson County, Arkansas, serving about 1,248 residents. It discharges under NPDES permit AR0041033 (effective), which expires in October 2027, with 5 recorded violations in the last three years.

Treatment technology

2 treatment structures and unit processes identified at Diaz WWTP.

Available with a free Klarifi account

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

Create a free account

Compliance snapshot (last 3 years)

Total violations: 5

Effluent violations: 5

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

Key contacts

Decision-makers at Diaz WWTP.

No verified contacts on file yet

Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.

Try Klarifi free

Nearby wastewater treatment plants in Arkansas

Newport, City Of - Airport/industrial Park

Newport · 3 mi away

—

Newport, City Of

Newport · 4 mi away

0.97 MGD

Tuckerman, City Of - Wastewater Treatment Plant

Tuckerman · 6 mi away

0.13 MGD

Amagon, City Of

Amagon · 9 mi away

0.002 MGD

Grubbs, City Of

Grubbs · 10 mi away

—

Oil Trough, City Of

Oil Trough · 11 mi away

—

Newark, City Of

Newark · 12 mi away

0.02 MGD

Swifton, City Of

Swifton · 13 mi away

0.04 MGD

Diaz 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 25, 2026.

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

Try Klarifi for free

Create your own trial account and explore how Klarifi can help you.

Try for free