Porter Creek Dwid, AZ
Lead detected, under the action levels
Latest 90th-percentile lead: 1.3 ppb (monitoring period 2020-2022). 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.
Porter Creek Dwid at a glance
Porter Creek Dwid serves about 250 people through 102 service connections, which makes it a very small system under EPA's size classes. It is under mixed public and private ownership and draws groundwater, in Navajo County, Arizona. EPA system ID: AZ0409013; phone on file: 928-367-6621. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is down 1.9 ppb from 3.2 ppb in the period ending 2019. The highest 90th-percentile result EPA holds for Porter Creek Dwid is 4.6 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2022 | 1.3 ppb |
| 2019 | 3.2 ppb |
| 2018 | 0 (not detected) |
| 2017 | 4.6 ppb |
| 2016 | 3.3 ppb |
| 2016 | 1.6 ppb |
| 2016 | 1.6 ppb |
Against other Arizona systems
Of the 730 Arizona systems with a lead result, the median latest reading is 0 ppb; 9 are over 15 ppb right now and 58 have gone over at some point. Porter Creek Dwid's 1.3 ppb sits at the 77th percentile in Arizona and the 60th nationally (higher means more lead).
Other water systems in Navajo County
39 other systems share Navajo County; 12 of them have a higher latest lead result than Porter Creek Dwid. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Show Low | 17,139 | 0 (not detected) |
| Arizona Water Co - Overgaard | 13,797 | 0 (not detected) |
| Arizona Water Co - Lakeside | 12,191 | 7.8 ppb |
| Winslow City Of | 9,789 | 0 (not detected) |
| Snowflake Town Of | 5,590 | 1.7 ppb |
| Ponderosa Dwid | 5,375 | 0 (not detected) |
| Holbrook City Of | 4,833 | 0 (not detected) |
| Town Of Taylor | 4,190 | 0 (not detected) |
| Arizona Water Co - Pinetop Lakes | 3,558 | 0 (not detected) |
| Pinetop Water Community Facilities Dist | 3,250 | 10 ppb |
Next steps for Lakeside, AZ
Test your own tap with a certified lab first-draw sample; Lakeside, AZ 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 Porter Creek Dwid 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. Size matters more than most people expect: small vs large water systems.