Northwest Wrp
Mesa, AZ · Maricopa County · Publicly Owned Treatment Works
- Average flow
- 2.72 MGD
- Design flow
- 18 MGD
- NPDES permit
- AZ0024031
- Effective
- Permit expires
- November 2029
- Population served
- —
- CWNS 2022
Northwest Wrp is a publicly owned wastewater treatment plant in Mesa, Maricopa County, Arizona treating an average of 2.72 million gallons per day against a permitted design capacity of 18 MGD. It discharges under NPDES permit AZ0024031 (effective), which expires in November 2029, with 6 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
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.
Capital improvement projects in Mesa
Mesa's capital improvement plan lists 58 water, sewer and wastewater line items worth $1.5B starting 2023–2027. The largest budgeted items are shown here.
All water and sewer capital projects in Mesa →
| Project | Budget | Years |
|---|---|---|
| Central Mesa Reuse Pipeline Project | $222,052,779 | 2023–2029 |
| Signal Butte Water Treatment Plant Expansion | $207,752,360 | 2023–2029 |
| Advanced Metering Infrastructure (AMI) | $96,874,318 | 2023–2028 |
| Northwest WRP Major Plant Improvements | $85,752,021 | 2023–2029 |
| Sewer Line Replacement | $75,429,176 | 2023–2029 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
Decision-makers at Northwest Wrp.
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.
Nearby wastewater treatment plants in Arizona
Gilbert · 12 mi away
0.03 MGD
Apache Junction · 16 mi away
—
Phoenix · 16 mi away
35.67 MGD
Tolleson · 24 mi away
78.71 MGD
Tolleson · 25 mi away
—
Cave Creek · 30 mi away
—
Goodyear · 33 mi away
2.5 MGD
Casa Grande · 35 mi away
3.54 MGD
Northwest Wrp: 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 September 11, 2026; facility record last updated February 14, 2025.