Keswick Water System, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 6 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 Keswick Water System
Keswick Water System serves about 252 people through 134 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Keokuk County, Iowa. EPA system ID: IA5442029; phone on file: 319-667-2635. They can tell you what your service line is made of and whether they pay to replace it.
Keswick Water System's lead record
That is up 5 ppb from 1 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Keswick Water System is 6 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 6 ppb |
| 2021 | 1 ppb |
| 2018 | 1 ppb |
How Keswick Water System compares
Of the 1,066 Iowa systems with a lead result, the median latest reading is 1.4 ppb; 4 are over 15 ppb right now and 36 have gone over at some point. Keswick Water System's 6 ppb sits at the 92nd percentile in Iowa and the 93rd nationally (higher means more lead).
Nearby utilities
9 other systems share Keokuk County; 0 of them have a higher latest lead result than Keswick Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Sigourney Muni Water Works | 2,004 | 1.84 ppb |
| Keota Water Dept | 897 | 0 (not detected) |
| Hedrick Water Supply | 728 | 0 (not detected) |
| What Cheer Water Supply | 646 | 2.1 ppb |
| Richland Water Supply | 542 | 2 ppb |
| Delta Water Supply | 264 | 3.4 ppb |
| South English Water Supply | 238 | 1 ppb |
| Harper Water Supply | 118 | 0 (not detected) |
| Webster Municipal Water Works | 96 | 2 ppb |
Next steps for South English, IA
Test your own tap with a certified lab first-draw sample; South English, IA 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 Keswick Water System 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. Size matters more than most people expect: small vs large water systems.