Window Washing in Lowell

Lowell has one water source and no fallback. The Lowell Regional Water Utility's only supply is surface water from the Merrimack River, which rises in the White Mountains of New Hampshire, drawn at an intake on the riverbank and pumped half a mile to the treatment plant.

The interconnections around the city run one way. The utility supplies Dracut, Tyngsboro, Tewksbury and Chelmsford, and it states plainly that those neighbours cannot supply water back to Lowell — a single-source system serving around 135,000 people across five communities.

No hardness figure is stated here, because the utility's 2025 annual report — a scanned document read page by page — does not print one.

There is a specific reason not to guess at a river figure. The Merrimack is classified as a Class B waterway, meaning water withdrawn for drinking must be treated, and it runs past and receives discharge from a chain of former mill cities upstream — so its character is not that of a protected upland reservoir even though it begins in the mountains.

The utility runs an effective corrosion control programme and is working through a lead service line inventory and replacement project, verifying service materials across the system. Corrosion control at that emphasis is consistent with a soft river supply, which is direction rather than measurement.

The scale of the system is modest and the rates are notably low — the utility reports being among the lowest five per cent of more than two hundred and seventy Massachusetts communities — across 215 miles of main, 2,300 hydrants and around 26,000 service connections.

What actually governs the work here is the building stock, and Lowell's is unusually extreme in both directions. The downtown mill complex carries industrial sash in enormous runs, while the residential districts are dominated by triple-deckers on lots too narrow to foot a ladder at the upper storeys.

The immediate Atlantic coast — North Shore from Salem through Gloucester, South Shore from Cohasset through Plymouth, the entire Cape and Islands, the South Coast from Westport through New Bedford — sees year-round salt-aerosol deposition that intensifies during winter nor'easters. The deposition reaches inland up to fifteen miles during major coastal storms. Aluminum-frame corrosion is the long-term concern; the cleaning protocol is more frequent washing rather than aggressive intervention.

MassDOT and the municipal road commissions apply heavy salt loads to keep the state's narrow secondary roads passable through the winter. Salt aerosol on ground-floor glass within a quarter-mile of any plowed road is the dominant winter contamination pattern, and slush splatter from passing traffic coats the lower third of ground-floor glass on road-facing exposures. The post-winter call drives the entire residential spring schedule from the first week of April through the second week of May.

New England deciduous canopy produces one of the heaviest fall leaf loads in the country. The October-November leaf-litter wave deposits maple, oak, and beech debris on flat surfaces and into screen frames. Tannin staining from wet leaf-litter that sits on white painted sashes produces a brown discoloration that requires citric pre-treatment to remove. The pre-Thanksgiving residential rush is heavy and concentrated.

The eastern half of the state, especially the MetroWest and the South Shore, sees a heavy oak and pine pollen load in late April through May. Yellow-green pollen films horizontal and east-facing vertical glass for two to three weeks. Surfactant pre-rinse is the working answer; the cleaning load shapes the spring residential calendar across the entire state.

The New England triple-decker housing stock — Worcester, Lowell, Lawrence, Lynn, parts of Boston and Cambridge — concentrates rainwater runoff through cornice-and-gutter systems that frequently overwhelm during heavy rain. Resulting streaking patterns on the upper-floor glass require a citric pre-treatment and a longer dwell time than ordinary cleaning. The pattern is endemic to the substrate and most New England cleaners recognize it without needing it diagnosed.

The wind-driven sand-and-salt mix on the Cape and the Islands deposits a fine abrasive film on exterior glass year-round. The summer season concentrates the deposition due to higher wind events and the tourist-rental property turnover. The cleaning protocol requires a thorough pre-rinse to avoid scratching during the squeegee pass — a working consideration that distinguishes Cape and Islands work from any other part of the state.