Colonial Terrace Mhp Llc, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 4 ppb (monitoring period 2026-2026). 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
Colonial Terrace Mhp Llc serves about 250 people through 91 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Marion County, Iowa. EPA system ID: IA6342601; phone on file: 515-249-3828. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Colonial Terrace Mhp Llc's lead record
That is up 4 ppb from 0 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Colonial Terrace Mhp Llc is 4 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 4 ppb |
| 2025 | 0 (not detected) |
How Colonial Terrace Mhp Llc 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. Colonial Terrace Mhp Llc's 4 ppb sits at the 83rd percentile in Iowa and the 87th nationally (higher means more lead).
Nearby utilities
12 other systems share Marion County; 1 of them has a higher latest lead result than Colonial Terrace Mhp Llc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Pella Water Works Department | 11,052 | 0.7 ppb |
| Knoxville Water Works | 8,400 | 7.8 ppb |
| Marion Co. Rural Water District | 5,687 | 1.9 ppb |
| Pleasantville Water Works | 1,676 | 0 (not detected) |
| Melcher-Dallas Water Supply | 1,213 | 1.4 ppb |
| Irua - Pershing Utilities | 488 | 1.5 ppb |
| Bussey Water Supply | 427 | 1.4 ppb |
| Wheel Estates Mhc | 315 | 2.2 ppb |
| Sunrise Mill | 237 | 0 (not detected) |
| Marion Co Rwd (Harvey) | 236 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Knoxville, 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 Colonial Terrace Mhp Llc 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.