Southwest Wa-Tower Hill (Missouri West), ND
Lead detected, under the action levels
Latest 90th-percentile lead: 1.67 ppb (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. 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.
Southwest Wa-Tower Hill (Missouri West) at a glance
Southwest Wa-Tower Hill (Missouri West) serves about 43 people through 12 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 Morton County, North Dakota. EPA system ID: ND3001489; phone on file: 701-225-0241. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is up 1.67 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Southwest Wa-Tower Hill (Missouri West) is 1.67 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.67 ppb |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 0 (not detected) |
How Southwest Wa-Tower Hill (Missouri West) compares
Of the 300 North Dakota systems with a lead result, the median latest reading is 0.91 ppb; 3 are over 15 ppb right now and 20 have gone over at some point. Southwest Wa-Tower Hill (Missouri West)'s 1.67 ppb sits at the 67th percentile in North Dakota and the 66th nationally (higher means more lead).
Other water systems in Morton County
11 other systems share Morton County; 1 of them has a higher latest lead result than Southwest Wa-Tower Hill (Missouri West). If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mandan City Of | 21,769 | 4.2 ppb |
| Missouri West Water System | 4,303 | 0 (not detected) |
| New Salem City Of | 946 | 1.54 ppb |
| Glen Ullin City Of | 807 | 0 (not detected) |
| Hebron City Of | 747 | 0 (not detected) |
| Crown Butte Coop | 320 | 0 (not detected) |
| Flasher City Of | 232 | 0.52 ppb |
| Riverview Heights | 200 | 0 (not detected) |
| Southwest Wa-Junction Inn(Missouri West) | 173 | 0 (not detected) |
| Almont City Of | 122 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Dickinson, ND 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 Southwest Wa-Tower Hill (Missouri West) 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. The action level is dropping - the 10 ppb rule from 2027.