Katherine Landing Dwtp, NV
Lead detected, under the action levels
Latest 90th-percentile lead: 4.8 ppb (monitoring period 2024-2026). 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.
Who runs the water here
Katherine Landing Dwtp serves about 1,300 people through 41 service connections, which makes it a small system under EPA's size classes. It is federally owned and draws surface water, in Mohave County, Nevada. EPA system ID: AZ0408701; phone on file: 702-575-8770. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is up 3.1 ppb from 1.7 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for Katherine Landing Dwtp is 15 ppb across 5 monitoring periods, none of them over 15 ppb (2 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 4.8 ppb |
| 2023 | 1.7 ppb |
| 2020 | 15 ppb over 10 |
| 2019 | 14 ppb over 10 |
| 2016 | 2.5 ppb |
Where this result ranks
Of the 204 Nevada systems with a lead result, the median latest reading is 1 ppb; 0 are over 15 ppb right now and 13 have gone over at some point. Katherine Landing Dwtp's 4.8 ppb sits at the 94th percentile in Nevada and the 90th nationally (higher means more lead).
Next steps for Boulder City, NV
Test your own tap with a certified lab first-draw sample; Boulder City, NV 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 Katherine Landing Dwtp 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.