Monroe Water System, WA
No lead results on file with EPA
Latest 90th-percentile lead: no result on file. The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. EPA's database has no Lead and Copper Rule results for this system. Without them there is nothing to go on, so a tap test is the only way to know.
About Monroe Water System
Monroe Water System serves about 23,467 people through 8,699 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Snohomish County, Washington. EPA system ID: WA5355820. Ask the utility on your bill for your address in their service line inventory.
Nearby utilities
117 other systems share Snohomish County. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Alderwood Water District | 245,715 | - |
| Everett Public Works Dept. City Of | 215,774 | 3.5 ppb |
| Marysville Utilities | 88,582 | 2 ppb |
| Lynnwood City Of | 68,204 | - |
| Sno Pud 1 - Lake Stevens | 67,710 | 3.2 ppb |
| Silver Lake Water & Sewer District | 65,033 | - |
| Edmonds City Of | 34,065 | - |
| Mukilteo Water & Wastewater Distr | 31,437 | - |
| Arlington City Of | 29,508 | 0 (not detected) |
| Mountlake Terrace City Of | 26,402 | - |
What to do in your house
Test your own tap with a certified lab first-draw sample; Monroe, WA may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Monroe Water System 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Size matters more than most people expect: small vs large water systems.