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City of Haverhill Water & Wastewater Services
Critical Drought

All nonessential outdoor water use is prohibited. See what still is permitted

Updated September 15, 2026

Drinking water

Water quality

The treatment plant runs 24 hours a day, every day. Water quality is monitored continuously by laboratory testing and online analysis to meet and exceed state and federal drinking water regulations at all times.

Most recent report

2025 Water Quality Report

Also called the Consumer Confidence Report. The city prepares one every year and mails it to every customer.

Read the 2025 report Screen-reader version

Earlier reports

Where your water comes from

Haverhill draws on four surface water sources with two more held in reserve. All of them reach the treatment plant through Kenoza Lake, the terminal reservoir the plant sits beside.

  • Kenoza Lake

    Terminal reservoir

    The treatment plant sits adjacent. All other sources arrive here first.

  • Millvale Reservoir

    Pumped supply

    Currently offline, held at lower levels to capture future rainfall.

  • Crystal Lake

    Pumped supply

    Approximately 1 million gallons per day pumped into the system.

  • Round Pond

    Gravity supply

    Flows to Kenoza Lake by gravity, no pumping required.

  • Chadwick Pond

    Emergency reserve

    Held for emergency use only.

  • Johnsons Pond

    Emergency reserve

    Held for emergency use only.

How it is treated

The plant was built in 1980 and completely renovated in 2020. It can treat 12 million gallons a day and produces over 2 billion gallons a year.

Capacity
12 MGD
Average production
6 MGD
Operating hours
24/7
  1. 1

    Pre-oxidation

    First chemical step on raw lake water

  2. 2

    Coagulation

    Flash mixing and static mixers

  3. 3

    Tapered flocculation

    Particles gathered into larger floc

  4. 4

    Dissolved air flotation

    Floc lifted and skimmed off the surface

  5. 5

    Sand media filtration

    Remaining particulate removed

  6. 6

    Granular activated carbon

    Adsorption for taste, odor and organics

  7. 7

    Fluoridation

    Dental health additive

  8. 8

    Corrosion control

    Zinc orthophosphate protects pipe interiors

  9. 9

    Chlorine disinfection

    Residual maintained through the distribution system

Questions about a test result

Talk to the plant directly

The treatment plant answers questions about water quality and laboratory analysis on (978) 374-2385. Laboratory analysis fees vary by test. The plant is at 131 Amesbury Road.