Haverhill Wastewater Treatment Facility
Haverhill, MA · Essex County · Publicly Owned Treatment Works
- Average flow
- 6.58 MGD
- Design flow
- —
- NPDES permit
- MAL101621
- Effective
- Permit expires
- December 2030
- Population served
- 61,329
- CWNS 2022
Haverhill Wastewater Treatment Facility is a publicly owned wastewater treatment works in Haverhill, Essex County, Massachusetts treating an average of 6.58 million gallons per day, serving about 61,329 residents. Treatment on site includes biosolids mechanical dewatering, disinfection, chlorine/ chloramine, flotation, primary clarification or sedimentation, screening and other unit processes. It discharges under NPDES permit MAL101621 (effective), which expires in December 2030, with 4 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Biosolids Mechanical Dewatering
unit processDisinfection, chlorine/ chloramine
unit processFlotation
unit processPrimary Clarification or Sedimentation
unit processScreening
unit processSuspended Growth, Aerobic
unit processUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 4
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Haverhill
Haverhill's capital improvement plan lists 20 water, sewer and wastewater line items worth $3M starting 2025–2026. The largest budgeted items are shown here.
All water and sewer capital projects in Haverhill →
| Project | Budget | Years |
|---|---|---|
| Capital Outlay | $665,000 | 2025–2026 |
| Future Carbon Replacement Filters | $320,000 | 2025–2025 |
| Catenary Screen Rehabilitation | $300,000 | 2026–2026 |
| Infrastructure Expense | $250,000 | 2025–2026 |
| Infrastructure Expense | $220,000 | 2025–2026 |
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
2 verified contacts for Haverhill Wastewater Treatment Facility, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Haverhill Wastewater Treatment Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Massachusetts
North Andover · 5 mi away
21.7 MGD
Merrimac · 6 mi away
0.28 MGD
Salisbury · 11 mi away
0.59 MGD
Newburyport · 11 mi away
1.45 MGD
Ipswich · 12 mi away
0.5 MGD
Billerica · 16 mi away
2.88 MGD
Salem · 19 mi away
17.57 MGD
Manchester · 20 mi away
0.29 MGD
Haverhill Wastewater Treatment Facility: 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 May 19, 2025.