St Maries City Of, ID
Lead detected, under the action levels
Latest 90th-percentile lead: 1 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.
Who runs the water here
St Maries City Of serves about 4,173 people through 1,669 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Benewah County, Idaho. EPA system ID: ID1050024; phone on file: 208-245-2577. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is down 2 ppb from 3 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for St Maries City Of is 4 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1 ppb |
| 2022 | 3 ppb |
| 2019 | 0 (not detected) |
| 2019 | 4 ppb |
| 2016 | 4 ppb |
Against other Idaho systems
Of the 763 Idaho systems with a lead result, the median latest reading is 1 ppb; 3 are over 15 ppb right now and 46 have gone over at some point. St Maries City Of's 1 ppb sits at the 56th percentile in Idaho and the 55th nationally (higher means more lead).
Nearby utilities
8 other systems share Benewah County; 2 of them have a higher latest lead result than St Maries City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Plummer City Of | 1,034 | 1 ppb |
| Fernwood Water Dist | 521 | 1 ppb |
| Santa Water And Sewer Dist | 160 | 1 ppb |
| Cottonwood Point Water Assn | 158 | 4 ppb |
| Tensed City Of | 146 | 3.8 ppb |
| Emida Water And Sewer Association | 120 | 0 (not detected) |
| Evergreen Terrace Water Association | 85 | 1 ppb |
| Cassandra Hills Owners Assn | 57 | 1 ppb |
Your move
Test your own tap with a certified lab first-draw sample; St Maries, ID 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 St Maries City 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. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.