Oswego, City Of, KS
Lead detected, under the action levels
Latest 90th-percentile lead: 3.2 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 Oswego, City Of
Oswego, City Of serves about 1,680 people through 823 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 surface water, in Labette County, Kansas. EPA system ID: KS2009908; phone on file: 620-795-4433. 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 2021 (3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Oswego, City Of is 5.6 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 3.2 ppb |
| 2021 | 3 ppb |
| 2020 | 5.6 ppb |
| 2019 | 5.1 ppb |
| 2017 | 2.2 ppb |
| 2017 | 2.5 ppb |
| 2016 | 2.5 ppb |
| 2016 | 2.1 ppb |
Against other Kansas systems
Of the 832 Kansas systems with a lead result, the median latest reading is 1.4 ppb; 2 are over 15 ppb right now and 35 have gone over at some point. Oswego, City Of's 3.2 ppb sits at the 81st percentile in Kansas and the 84th nationally (higher means more lead).
Other water systems in Labette County
14 other systems share Labette County; 2 of them have a higher latest lead result than Oswego, City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Parsons, City Of | 9,479 | 3.2 ppb |
| Labette Co Rwd 5 | 1,635 | 0 (not detected) |
| Labette Co Rwd 6 | 1,550 | 10 ppb |
| Labette Co Rwd 8 | 1,063 | 0 (not detected) |
| Altamont, City Of | 1,044 | 0 (not detected) |
| Chetopa, City Of | 921 | 0 (not detected) |
| Labette Co Rwd 7 | 540 | 4 ppb |
| Labette Co Rwd 3 | 420 | 0 (not detected) |
| Edna, City Of | 383 | 0 (not detected) |
| Mound Valley, City Of | 348 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Oswego, KS 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 Oswego, City Of 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. Size matters more than most people expect: small vs large water systems.