South Lamborn Mesa Water Company, CO
Lead detected, under the action levels
Latest 90th-percentile lead: 0.4 ppb (monitoring period 2025-2025). 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.
South Lamborn Mesa Water Company at a glance
South Lamborn Mesa Water Company serves about 47 people through 21 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Delta County, Colorado. EPA system ID: CO0115716; phone on file: 818-821-4741. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2024 (0.3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for South Lamborn Mesa Water Company is 1 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.4 ppb |
| 2024 | 0.3 ppb |
| 2023 | 0.5 ppb |
| 2022 | 0 (not detected) |
| 2021 | 0.5 ppb |
| 2020 | 1 ppb |
Against other Colorado systems
Of the 1,025 Colorado systems with a lead result, the median latest reading is 1 ppb; 2 are over 15 ppb right now and 71 have gone over at some point. South Lamborn Mesa Water Company's 0.4 ppb sits at the 39th percentile in Colorado and the 42nd nationally (higher means more lead).
Other water systems in Delta County
29 other systems share Delta County; 18 of them have a higher latest lead result than South Lamborn Mesa Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Delta City Of | 8,700 | - |
| Orchard City Town Of | 3,100 | 7 ppb |
| Upper Surface Creek Domestic Wua | 2,800 | 3 ppb |
| Paonia Town Of | 2,499 | 1.2 ppb |
| Cedaredge Town Of | 2,400 | 2 ppb |
| Hotchkiss Town Of | 2,050 | 0.8 ppb |
| Rogers Mesa Wc | 840 | 0 (not detected) |
| Crawford Mesa Wa | 486 | 8.4 ppb |
| Crawford Town Of | 477 | 1 ppb |
| Bone Mesa Domestic Wd | 400 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Paonia, CO 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 South Lamborn Mesa Water 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. The lead result guide covers how utilities pick the homes they sample. The action level is dropping - the 10 ppb rule from 2027.