Williamsport Municipal Water Authority

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Sanitary Authority

Water Supply and Quality

The Williamsport Municipal Water Authority (WMWA) furnishes water service to the Greater Williamsport Area's residents, businesses and institutions. The primary water supply is from a modern water filtration treatment plant which treats the water from the surface supply watersheds. Most of the watershed area is controlled by the WMWA. A wellfield supplements the surface supplies during dry years, normally for only two months every other year.

The surface supply treatment plant uses pretreatment, conventional filtration, and disinfection to produce high quality water. The pH and calcium carbonate saturation are adjusted to control corrosivity as part of the water treatment. The treated surface supply water has a relatively low hardness and the wellfield water has a moderate hardness; no softener is required for normal usage purposes. Both sources are fluoridated.

Typical Distribution System Water Quality

(mg/L unless otherwise noted) Surface Supply Wellfield Supply
Alkalinity total 50 – 60 42 - 50
Chloride 2 - 6 40 - 60
Conductivity, μmhos 125 - 150 250 - 275
Dissolved Solids 40 - 80 130 - 180
Fluoride 0.5 - 0.9 0.5 - 0.9
Free Chlorine 0.2 - 1.0 1.0 - 1.6
Hardness, total 45 - 55 70 - 85
Hardness, (grains per gal.) 2.3 - 2.6 4.0 - 4.9
Iron <0.01 - 0.1 0.05 - 0.1
pH (standard units) 8.1 - 8.5 8.0 - 8.5
Turbidity, NTU 0.02 - 0.1 0.1 - 0.4

The WMWA is committed to supplying a high quality and abundant water supply, and complies with all testing requirements and standards for EPA and PaDEP regulated inorganic, lead/copper, organic, radionuclides, disinfection by-products, turbidity, and microbiological contaminants.

Please contact the Executive Director if you require detailed analysis or specific supply or pressure capabilities.

WMWA Consumer Confidence Report - Click here for the latest annual report.


The WMWA participates in the “Partnership for Safe Water” Program sponsored by the Pennsylvania Department of Environmental Protection (PaDEP) and the American Water Works Association (AWWA).  The WMWA was recognized by the PaDEP for its “outstanding efforts” in meeting all Safe Drinking Water Act water quality monitoring, reporting, and treatment technique during the year 2004.

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Williamsport Municipal Water Authority and Williamsport Sanitary Authority
253 West Fourth Street  Williamsport, PA 17701 - Phone# 570-323-6148 - Email: info@wmwa-wsa.org