Knob Noster Pws, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 2.25 ppb (monitoring period 2022-2024). 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.
About Knob Noster Pws
Knob Noster Pws serves about 2,863 people through 1,347 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Johnson County, Missouri. EPA system ID: MO1010432; phone on file: 660-563-2595. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Knob Noster Pws's lead record
That is up 1.11 ppb from 1.14 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Knob Noster Pws is 2.25 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 2.25 ppb |
| 2022 | 1.14 ppb |
| 2021 | 1.14 ppb |
| 2021 | 1.14 ppb |
| 2019 | 1.12 ppb |
| 2018 | 1.12 ppb |
| 2018 | 1.12 ppb |
| 2016 | 1.82 ppb |
How Knob Noster Pws compares
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. Knob Noster Pws's 2.25 ppb sits at the 74th percentile in Missouri and the 75th nationally (higher means more lead).
Neighbouring systems
13 other systems share Johnson County; 0 of them have a higher latest lead result than Knob Noster Pws. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mo American Warrensburg | 18,500 | 0 (not detected) |
| Johnson County Pwsd 2 | 12,490 | 1.87 ppb |
| Whiteman Air Base | 10,106 | 0 (not detected) |
| Johnson County Pwsd 3 | 5,317 | 0 (not detected) |
| Johnson County Pwsd 1 | 4,240 | 1.08 ppb |
| Holden Pws | 2,683 | 0 (not detected) |
| Leeton Pws | 601 | 1.73 ppb |
| Chilhowee Pws | 382 | 0.87 ppb |
| Kingsville Pws | 345 | 0.52 ppb |
| Mo American East Warrensburg | 335 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Knob Noster, 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 Knob Noster Pws 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Systems that went over once often dip back under; here is what that means.