Nunn Town Of, CO
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Nunn Town Of serves about 499 people through 225 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 Weld County, Colorado. EPA system ID: CO0162559; phone on file: 970-897-2385. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is down 4 ppb from 4 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Nunn Town Of is 4 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2021 | 4 ppb |
| 2020 | 0.5 ppb |
| 2019 | 1.3 ppb |
| 2018 | 0.6 ppb |
| 2017 | 0.5 ppb |
Against other Colorado systems
Of the 1,025 Colorado systems with a lead result, the median latest reading is 1 ppb; 2 are over 15 ppb right now and 71 have gone over at some point. Nunn Town Of's reported as 0 (not detected) sits at the 22nd percentile in Colorado and the 22nd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Weld County
54 other systems share Weld County; 26 of them have a higher latest lead result than Nunn Town Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Greeley City Of | 132,310 | 4 ppb |
| Firestone Town Of | 27,798 | 3.6 ppb |
| Johnstown Town Of | 27,295 | 1 ppb |
| Windsor Town Of | 23,500 | 5.8 ppb |
| Evans City Of | 19,369 | 2.4 ppb |
| Frederick Town Of | 17,173 | 2.9 ppb |
| North Weld County Wd | 15,890 | 3.4 ppb |
| Ft Lupton City Of | 12,099 | 4 ppb |
| Severance Town Of | 11,733 | 2 ppb |
| Milliken Town Of | 9,200 | 0 (not detected) |
Your move
Look up your address in Nunn Town Of's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Nunn Town 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. A zero today does not rule out a jump later - the rules are tightening in 2027.