Sisters, City Of, OR
Lead detected, under the action levels
Latest 90th-percentile lead: 1.2 ppb (monitoring period 2025-2025). 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.
Sisters, City Of at a glance
Sisters, City Of serves about 3,778 people through 2,200 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 groundwater, in Deschutes County, Oregon. EPA system ID: OR4100826; phone on file: 541-323-5212. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Sisters, City Of's lead record
That is up 1.2 ppb from 0 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Sisters, City Of is 6.8 ppb across 10 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.2 ppb |
| 2024 | 0 (not detected) |
| 2023 | 1.2 ppb |
| 2022 | 1.7 ppb |
| 2022 | 3.2 ppb |
| 2022 | 6.8 ppb |
| 2021 | 3.2 ppb |
| 2019 | 2 ppb |
| 2018 | 2 ppb |
| 2016 | 3 ppb |
Against other Oregon systems
Of the 909 Oregon systems with a lead result, the median latest reading is 1 ppb; 15 are over 15 ppb right now and 71 have gone over at some point. Sisters, City Of's 1.2 ppb sits at the 56th percentile in Oregon and the 59th nationally (higher means more lead).
Neighbouring systems
65 other systems share Deschutes County; 13 of them have a higher latest lead result than Sisters, City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Bend, City Of | 77,704 | 0 (not detected) |
| Redmond Water Department | 38,208 | 0.45 ppb |
| Avion Wc - Greater Avion | 35,332 | 0 (not detected) |
| Roats Water System | 6,469 | 0.95 ppb |
| Sunriver Water Llc/Sunriver Utilities | 4,300 | 0 (not detected) |
| Agate Water System | 3,153 | 0 (not detected) |
| La Pine, City Of | 2,807 | 0 (not detected) |
| Oregon Water Utilities - Cline Butte Inc | 2,526 | 0 (not detected) |
| Water Wonderland Improv Dist 2 | 1,800 | 0 (not detected) |
| Terrebonne Domestic Water District | 1,400 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Sisters, OR 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 Sisters, 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.