New Castle Water Company, UT
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
New Castle Water Company serves about 350 people through 126 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Iron County, Utah. EPA system ID: UTAH11013; phone on file: 435-231-5343. 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 2016 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for New Castle Water Company is 0 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2016 | 0 (not detected) |
How New Castle Water Company compares
Of the 521 Utah systems with a lead result, the median latest reading is 1.71 ppb; 8 are over 15 ppb right now and 27 have gone over at some point. New Castle Water Company's reported as 0 (not detected) sits at the 6th percentile in Utah and the 20th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
27 other systems share Iron County; 21 of them have a higher latest lead result than New Castle Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Cedar City Waterworks | 39,670 | 0 (not detected) |
| Enoch City Water System | 6,500 | 0.9 ppb |
| Cedar Valley Water Conservancy | 3,995 | 0.18 ppb |
| Parowan City Water System | 3,000 | 6.7 ppb |
| Brian Head Town Water System | 1,038 | 2.4 ppb |
| Mid Valley Estates | 753 | 0 (not detected) |
| Paragonah Town Water System | 600 | 2.4 ppb |
| Kanarraville Town Water System | 452 | 6 ppb |
| Buena Vista Community | 440 | 3.55 ppb |
| Meadows Ranch | 350 | 2.57 ppb |
Next steps for Newcastle, UT
Look up your address in New Castle Water Company'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 New Castle Water Company 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.