Keithley Beach Subd, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 1.74 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.
Keithley Beach Subd at a glance
Keithley Beach Subd serves about 240 people through 92 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Benton County, Missouri. EPA system ID: MO3036166; phone on file: 816-665-2572. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2022 (2.42 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Keithley Beach Subd is 2.42 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.74 ppb |
| 2022 | 2.42 ppb |
| 2022 | 2.42 ppb |
| 2019 | 1.93 ppb |
| 2019 | 1.93 ppb |
| 2019 | 1.56 ppb |
Against other Missouri systems
Of the 1,674 Missouri systems with a lead result, the median latest reading is 1.04 ppb; 2 are over 15 ppb right now and 74 have gone over at some point. Keithley Beach Subd's 1.74 ppb sits at the 66th percentile in Missouri and the 67th nationally (higher means more lead).
Other water systems in Benton County
24 other systems share Benton County; 7 of them have a higher latest lead result than Keithley Beach Subd. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Warsaw Pws | 2,402 | 2.56 ppb |
| Cole Camp Pws | 1,150 | 1.11 ppb |
| Lincoln Pws | 1,100 | 0 (not detected) |
| Sterett Creek Village | 505 | 0.6 ppb |
| Mo American Whitebranch Subd | 450 | 1 ppb |
| Winegars Teal Bend Subd | 400 | 7 ppb |
| Spring Branch Water | 273 | 0 (not detected) |
| Sycamore Valley Subd | 245 | 0.76 ppb |
| Blue Branch Improvement Assn Inc | 200 | 1.77 ppb |
| The Missing Well | 173 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Warsaw, MO 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 Keithley Beach Subd 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.