- EPA's UCMR 5 testing looked for 30 contaminants here and found 8.
- Lithium: found in 14 of 16 samples, average 29.8 µg/L, highest 78.1 µg/L (EPA UCMR 5 testing, Apr 2024–Oct 2024)
- PFHxS (a PFAS): found in 4 of 16 samples, average 3.4 ppt, highest 25.4 ppt (EPA UCMR 5 testing, Apr 2024–Oct 2024)
- PFOS (a PFAS): found in 2 of 16 samples, average 3.2 ppt, highest 28.2 ppt (EPA UCMR 5 testing, Apr 2024–Oct 2024)
- PFNA (a PFAS): found in 2 of 16 samples, average 0.90 ppt, highest 8.2 ppt (EPA UCMR 5 testing, Apr 2024–Oct 2024)
- PFBS (a PFAS): found in 2 of 16 samples, average 0.70 ppt, highest 6.7 ppt (EPA UCMR 5 testing, Apr 2024–Oct 2024)
- PFHxA (a PFAS): found in 2 of 16 samples, average 0.70 ppt, highest 6.5 ppt (EPA UCMR 5 testing, Apr 2024–Oct 2024)
- PFPeA (a PFAS): found in 2 of 16 samples, average 0.60 ppt, highest 4.8 ppt (EPA UCMR 5 testing, Apr 2024–Oct 2024)
- PFPeS (a PFAS): found in 1 of 16 samples, average 0.30 ppt, highest 4.4 ppt (EPA UCMR 5 testing, Apr 2024–Oct 2024)
- Lead: 9 in 10 homes tested came in at or below 1 ppb, at or below EPA's 15 ppb action level (latest EPA result for a testing period that ran on or after July 1, 2021: Jan 1, 2024–Dec 31, 2026). This is one number for the whole water system, from homes the utility tested. It isn't a result for your home.
Public EPA test results
Can you drink Garden City tap water? What EPA records show
EPA system ID ID4010066 · serves Ada County, ID · about 12,500 people (EPA records)
Here's what EPA has on file for this water system: its testing for newer contaminants like PFAS (UCMR 5), lead testing and violations. It's not a test of your tap, and there's no Water Score here.
Public EPA test results
Garden City Water and Sewer System (EPA ID4010066)
EPA data as of October 14, 2026. For Garden City's main utility, Garden City Water and Sewer System: We found no health-standard violations in EPA's records for this system (ID4010066) since July 1, 2021, as of October 14, 2026. EPA's UCMR 5 testing looked for 30 contaminants here and found 8.
What EPA records show for Garden City Water and Sewer System, as of October 14, 2026
We found no health-standard violations in EPA's records for this system (ID4010066) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Garden City Water and Sewer System (SDWIS). Data as of October 14, 2026.
Lead: 9 in 10 homes tested came in at or below 1 ppb, at or below EPA's 15 ppb action level (latest EPA result for a testing period that ran on or after July 1, 2021: Jan 1, 2024–Dec 31, 2026). This is one number for the whole water system, from homes the utility tested. It isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 8.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does Garden City Water and Sewer System use chloramine?
We didn't find chloramine in Garden City Water and Sewer System's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.