Cape Horn Maintenance Company, WA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.4 ppb (monitoring period 2023-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Cape Horn Maintenance Company at a glance
Cape Horn Maintenance Company serves about 940 people through 566 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Skagit County, Washington. EPA system ID: WA5311060. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2022 (1.9 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Cape Horn Maintenance Company is 1.9 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.4 ppb |
| 2022 | 1.9 ppb |
| 2019 | 1.2 ppb |
| 2016 | 1 ppb |
Where this result ranks
Of the 2,218 Washington systems with a lead result, the median latest reading is 1 ppb; 18 are over 15 ppb right now and 62 have gone over at some point. Cape Horn Maintenance Company's 1.4 ppb sits at the 58th percentile in Washington and the 62nd nationally (higher means more lead).
Other water systems in Skagit County
38 other systems share Skagit County; 17 of them have a higher latest lead result than Cape Horn Maintenance Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Skagit County Pud 1 Judy Res | 111,415 | 0 (not detected) |
| Anacortes City Of | 25,109 | 1.1 ppb |
| Shelter Bay Community Inc | 2,212 | 1.6 ppb |
| Skagit Co Water District #1 | 1,974 | 0 (not detected) |
| La Conner Water Dept | 1,821 | 0 (not detected) |
| Blanchard Edison Water Assn. Inc. | 1,480 | 2.8 ppb |
| Concrete Utilities | 1,234 | 1.8 ppb |
| Samish Farms Water Assn | 1,017 | 5.3 ppb |
| Lyman Water Department | 705 | 3.1 ppb |
| Del Mar Community Service | 657 | 1.1 ppb |
Next steps for Mt Vernon, WA
Test your own tap with a certified lab first-draw sample; Mt Vernon, 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 Cape Horn Maintenance Company 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. The action level is dropping - the 10 ppb rule from 2027.