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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
EPA records for KUNA CITY OF • Updated October 2026
Grade B — based on EPA compliance records, lead testing and PFAS monitoring
KUNA CITY OF is in good standing with EPA, with only minor deductions for monitoring paperwork, low-level PFAS or historical readings near a limit.
Yes — by EPA's records Kuna, ID tap water is safe to drink and earns a B. The grade rests on no health-based EPA violations in the last five years and lead at 0 ppb (90th percentile, 2023) against the 15 ppb action level. Lead from your own service line or plumbing is the main risk city-level data cannot see, so homes built before 1986 should still test at the tap.
Yes — by EPA's records Kuna, ID tap water is safe to drink and earns a B. The grade rests on no health-based EPA violations in the last five years and lead at 0 ppb (90th percentile, 2023) against the 15 ppb action level. Lead from your own service line or plumbing is the main risk city-level data cannot see, so homes built before 1986 should still test at the tap.
KUNA CITY OF's most recent Lead and Copper Rule result (2021-01-01 to 2023-12-31) was 0 ppb at the 90th percentile, below EPA's 15 ppb action level. Because lead usually comes from service lines and household plumbing, homes built before 1986 should still test at the tap.
No. None of the 290 UCMR5 PFAS results for KUNA CITY OF (2024-10-14 to 2025-04-16) were at or above the reporting limit of roughly 3–5 ppt.
KUNA CITY OF has 175 violations on file since 2016: 0 health-based in the last five years and 1 monitoring or reporting violation in that window. Monitoring violations are paperwork lapses, not measured contamination.
KUNA CITY OF reports groundwater as its primary source and serves about 32,038 people (EPA PWSID ID4010085).
Not on the strength of EPA's data for KUNA CITY OF. A filter still helps with taste and with lead from your own plumbing, which no city-level test can measure.
Compare filter options for your Kuna tap water
EPA data describes water leaving the plant — a certified mail-in lab test shows what reaches your own faucet, including lead from household plumbing.
See the filters matched to Kuna's EPA results → — which certification actually removes what was found here, and what it does not touch.
Unsure which contaminants to treat? Compare home kits and certified lab testing before buying.
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KUNA CITY OF · SDWIS records since 2016 · 5-year window starts 2021-09-13
EPA records no health-based violations for this system in the last five years. The 1 violation on file in that window is monitoring or reporting paperwork issues, not measured contaminant exceedances.
| Violation | Category | Compliance period | Status |
|---|---|---|---|
| Monitoring and Reporting (DBP)Chlorine | Monitoring & reporting | 2022-10-01 → 2022-12-31 | Archived |
| Monitoring, RegularBHC-GAMMA | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularDalapon | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularGlyphosate | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularDi(2-ethylhexyl) adipate | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularSimazine | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularPicloram | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularCarbofuran | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularLASSO | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularHeptachlor | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularHeptachlor epoxide | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularHEXACHLOROBENZENE | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularBenzo(a)pyrene | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularPentachlorophenol | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularTotal Polychlorinated Biphenyls (PCB) | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, Regular1,2-DIBROMO-3-CHLOROPROPANE | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularChlordane | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularEndrin | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularBHC-GAMMA | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularMethoxychlor | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularDalapon | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularDi(2-ethylhexyl) adipate | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularCarbofuran | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularAtrazine | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
| Monitoring, RegularLASSO | Monitoring & reporting | 2020-01-01 → 2022-12-31 | Archived |
Showing 25 of 175 violations on file. Full record on EPA ECHO.
Source: ECHO SDWA bulk download (SDWA_VIOLATIONS_ENFORCEMENT.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-13)
EPA Lead and Copper Rule 90th-percentile results reported by KUNA CITY OF
Well below the 15 ppb action level. In the most recent monitoring period on file (2021-01-01 to 2023-12-31), 90% of the homes KUNA CITY OF sampled had lead at or below 0 ppb.
EPA's action level is 15 ppb (dropping to 10 ppb under the 2024 Lead and Copper Rule Improvements). There is no safe level of lead; the 90th-percentile figure describes the system, not your tap — homes with lead service lines or pre-1986 plumbing can be higher.
| Monitoring period | Lead 90th percentile | vs 15 ppb action level |
|---|---|---|
| 2021-01-01 → 2023-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2018-01-01 → 2020-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2017-07-01 → 2017-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2017-01-01 → 2017-06-30 | 0 ppb | Well below the 15 ppb action level |
| 2014-01-01 → 2016-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2011-01-01 → 2013-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2008-01-01 → 2010-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2005-01-01 → 2007-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2002-01-01 → 2004-12-31 | 0 ppb | Well below the 15 ppb action level |
| 1999-01-01 → 2001-12-31 | 0 ppb | Well below the 15 ppb action level |
| 1996-01-01 → 1998-12-31 | 5 ppb | Below the action level, but detectable |
| 1995-01-01 → 1995-12-31 | 5 ppb | Below the action level, but detectable |
Source: ECHO SDWA bulk download (SDWA_LCR_SAMPLES.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-13)
EPA UCMR5 monitoring, 2024-10-14 to 2025-04-16 · 290 PFAS results at entry points to the distribution system
No PFAS detected. None of the 290 UCMR5 PFAS results for KUNA CITY OF were at or above the method reporting limit. Reporting limits are about 3–5 ppt, so “not detected” means below that threshold — not proven zero.
| Compound | Detects / samples | Max (ppt) | Reporting limit | EPA MCL |
|---|---|---|---|---|
| PFOA | 0 / 10 | < 4 | 4 ppt | 4 ppt |
| PFOS | 0 / 10 | < 4 | 4 ppt | 4 ppt |
| PFHxS | 0 / 10 | < 3 | 3 ppt | 10 ppt |
| PFNA | 0 / 10 | < 4 | 4 ppt | 10 ppt |
| HFPO-DA | 0 / 10 | < 5 | 5 ppt | 10 ppt |
| PFBS | 0 / 10 | < 3 | 3 ppt | hazard index only |
“< 4 ppt” means below the laboratory reporting limit, not zero. ppt = parts per trillion (ng/L). Results are for finished water leaving the treatment plant.
Lithium (also monitored under UCMR5, not a PFAS): detected in 10 of 10 samples, max 21 µg/L. There is no federal limit for lithium.
What PFAS are and how to remove them →
Source: UCMR5 occurrence data, EPA Data Summary July 2026 (UCMR5_All.txt)
EPA Six-Year Review 4 compliance samples for KUNA CITY OF · finished water only · dated data, released 2024
These are the regulated-contaminant samples KUNA CITY OF reported to its state between 2012 and 2019 — the most recent nationwide sample-level dataset EPA has published. Gross alpha is flagged below; the status column explains why. Treat this as history, not today's tap water.
| Contaminant | Samples | Average | Max | EPA limit | Status |
|---|---|---|---|---|---|
| Arsenic | 6552 detects | 4.866 µg/L | 9 µg/L | 10 µg/LMCL | Within MCL |
| Nitrate (as N) | 6345 detects | 2.184 mg/L | 4.5 mg/L | 10 mg/LMCL | Within MCL |
| Fluoride | 108 detects | 0.335 mg/L | 1.05 mg/L | 4 mg/LMCL | Within MCL |
| Chromium (total) | 104 detects | 1.1 µg/L | 3 µg/L | 100 µg/LMCL | Within MCL |
| Uranium (combined) | 2927 detects | 12.276 µg/L | 28 µg/L | 30 µg/LMCL | Within MCL |
| Radium-226/228 | 246 detects | 0.492 pCi/L | 2.9 pCi/L | 5 pCi/LMCL | Within MCL |
| Gross alpha | 5 | 11.64 pCi/L | 29.5 pCi/L | 15 pCi/LMCL | 1 of 5 samples over MCL |
| Total trihalomethanes (TTHM) | 2215 detects | 2.762 µg/L | 11.6 µg/L | 80 µg/LMCL (LRAA) | Within MCL |
| Haloacetic acids (HAA5) | 224 detects | 0.305 µg/L | 2.57 µg/L | 60 µg/LMCL (LRAA) | Within MCL |
Averages count non-detects as zero. TTHM and HAA5 limits are locational running annual averages, so a single high sample is not a violation — we grade those on the average only. Lead and copper rows are individual tap samples and are shown for context; compliance (and our score) uses the 90th-percentile result above. LRAA = locational running annual average; ND = not detected.
Source: SYR4 Six-Year Review compliance monitoring data 2012–2019 (released 2024-03)
KUNA CITY OF · 11,363 service lines inventoried · Q2 2026 snapshot
KUNA CITY OF reports no lead or galvanized-requiring-replacement service lines and has classified 100% of its 11,363 lines as non-lead. Lead can still come from pre-1986 plumbing and fixtures inside a home.
Source: EPA SDWIS Service Line Inventory (Q2 2026) · PWS ID ID4010085 · See all Idaho lead service lines. We may earn a commission from filters and test kits, at no extra cost to you.
Groundwater systems draw from wells; naturally occurring arsenic, nitrate, radium and uranium are the readings to watch, along with PFAS near industrial or military sites.
How to test your tap water and the treatment options that actually fit Kuna homes
The most reliable way to know what is actually coming out of your tap is a certified mail-in lab test. City-wide EPA data (like the report above) reflects the water leaving the treatment plant, but contaminants such as lead and copper can be picked up from your own service line and household plumbing — so the water at your Kuna faucet can differ from the system average. A state-certified lab measures dozens of contaminants at once with results you can trust; you can also find one near you through the EPA's certified-lab list at epa.gov/dwlabcert. Hardware-store test strips are cheaper and instant, but they only screen for a few basics (chlorine, hardness, pH, and a rough lead pass/fail) and are far less accurate — treat them as a first look, not a diagnosis.
Match the treatment to what your test finds. Reverse osmosis (RO) removes the widest range of contaminants — lead, arsenic, nitrate, PFAS, and dissolved solids — which makes an under-sink reverse osmosis system the most thorough choice for Kuna households with heavy-metal or PFAS concerns. If your main issue is taste, odor, or chlorine, an activated carbon filter (pitcher, faucet, or under-sink) is simpler and cheaper and handles chlorine and many organic compounds well, though carbon alone does not remove arsenic, nitrate, or most PFAS. NSF-certified pitchers rated for lead reduction are the easiest way to start today while you decide on a permanent setup.
We may earn a commission from testing kits and filters purchased through these links, at no extra cost to you.
What Kuna residents measured at their own tap (ZIPs 83634). All reader results →
Reader submissions are unverified and shown separately from EPA data. They reflect one tap on one day, not the utility's compliance record.
No reader results for Kuna yet - yours would be the first. A hardness or TDS number from a $10 strip kit is enough to start the map.
Help build the first reader-sourced water map. Enter whatever your test strip, TDS pen or lab report shows - one number is enough.
Kuna ranks #11 of 20 graded Idaho cities.
Yes — by EPA's records Kuna, ID tap water is safe to drink and earns a B. The grade rests on no health-based EPA violations in the last five years and lead at 0 ppb (90th percentile, 2023) against the 15 ppb action level. Lead from your own service line or plumbing is the main risk city-level data cannot see, so homes built before 1986 should still test at the tap.
KUNA CITY OF's most recent Lead and Copper Rule result (2021-01-01 to 2023-12-31) was 0 ppb at the 90th percentile, below EPA's 15 ppb action level. Because lead usually comes from service lines and household plumbing, homes built before 1986 should still test at the tap.
No. None of the 290 UCMR5 PFAS results for KUNA CITY OF (2024-10-14 to 2025-04-16) were at or above the reporting limit of roughly 3–5 ppt.
KUNA CITY OF has 175 violations on file since 2016: 0 health-based in the last five years and 1 monitoring or reporting violation in that window. Monitoring violations are paperwork lapses, not measured contamination.
KUNA CITY OF reports groundwater as its primary source and serves about 32,038 people (EPA PWSID ID4010085).
Not on the strength of EPA's data for KUNA CITY OF. A filter still helps with taste and with lead from your own plumbing, which no city-level test can measure.
Even with good water quality, a filter removes trace contaminants and improves taste.
For Everyday Peace of Mind
Brita Elite Pitcher
Your water already tests well — a simple carbon filter improves taste and catches trace contaminants.
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Find the right filter for your Kuna water quality needs:
Tap water is one piece of the picture — our sister sites cover the rest for Kuna, ID.
County radon prediction and EPA zone for homes around Kuna.
Arsenic and nitrate risk for homes on a well instead of city water.
Understand your water better with our in-depth guides on contaminants, filtration, and water safety.