Washington Suburban Sanitary Commission, MD

Lead reported as not detected

Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2018-2020). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.

Washington Suburban Sanitary Commission at a glance

Washington Suburban Sanitary Commission serves about 1,900,000 people through 438,639 service connections, which makes it a very large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Montgomery County, Maryland. EPA system ID: MD0150005; phone on file: 301-802-3286. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.

Washington Suburban Sanitary Commission's lead record

That is down 1.05 ppb from 1.05 ppb in the period ending 2017. The highest 90th-percentile result EPA holds for Washington Suburban Sanitary Commission is 1.05 ppb across 2 monitoring periods, none of them over 15 ppb.

How Washington Suburban Sanitary Commission compares

Of the 437 Maryland systems with a lead result, the median latest reading is 0 ppb; 3 are over 15 ppb right now and 21 have gone over at some point. Washington Suburban Sanitary Commission's reported as 0 (not detected) sits at the 52nd percentile in Maryland and the 40th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.

Nearby utilities

4 other systems share Montgomery County; 1 of them has a higher latest lead result than Washington Suburban Sanitary Commission. If you are unsure which one supplies your house, the name on your water bill decides it.

Your move

Look up your address in Washington Suburban Sanitary Commission's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Washington Suburban Sanitary Commission whether it covers that cost before hiring anyone - many utilities now do.

These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. The lead result guide covers how utilities pick the homes they sample. A zero today does not rule out a jump later - the rules are tightening in 2027.