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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 PRESCOTT CITY OF • Updated September 2026
Grade F — based on EPA compliance records, lead testing and PFAS monitoring
PRESCOTT CITY OF has serious issues in EPA's records: repeated health-based violations, unresolved violations, PFAS above the federal limit or lead near the action level. We recommend filtering drinking water.
Prescott, AZ tap water is legal to drink but grades F on EPA's records, mainly because of 1 health-based EPA violation in the last five years and PFOA or PFOS measured at or above the 4 ppt federal limit in 2023–2025 EPA sampling. A certified filter matched to those findings is a reasonable precaution.
Prescott, AZ tap water is legal to drink but grades F on EPA's records, mainly because of 1 health-based EPA violation in the last five years and PFOA or PFOS measured at or above the 4 ppt federal limit in 2023–2025 EPA sampling. A certified filter matched to those findings is a reasonable precaution.
PRESCOTT CITY OF's most recent Lead and Copper Rule result (2023-01-01 to 2025-12-31) 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.
Yes. EPA's UCMR5 sampling (2023-05-16 to 2023-11-07) detected PFBS, PFHpA, PFHxA, PFHxS, PFOA, PFOS, PFPeA, with PFOA or PFOS at or above the 4 ppt federal MCL. Reverse osmosis and certified activated-carbon filters reduce PFAS.
PRESCOTT CITY OF has 84 violations on file since 2016: 1 health-based in the last five years and 36 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
PRESCOTT CITY OF reports groundwater as its primary source and serves about 42,217 people (EPA PWSID AZ0413045).
We recommend one. Reverse osmosis or a PFAS-certified carbon filter addresses the PFAS result.
Compare filter options for your Prescott tap water
PFOA or PFOS was measured at or above EPA's 4 ppt limit in Prescott's UCMR5 sampling.
Unsure which contaminants to treat? Compare home kits and certified lab testing before buying.
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PRESCOTT CITY OF · SDWIS records since 2016 · 5-year window starts 2021-09-13
EPA records 1 health-based violation for this system in the last five years, all of which are marked resolved or archived. Health-based violations mean a contaminant exceeded its Maximum Contaminant Level (MCL) or a required treatment step was not met.
| Violation | Category | Compliance period | Status |
|---|---|---|---|
| Failure To Address DeficiencyGroundwater Rule | Treatment technique | 2025-01-03 | Resolvedreturned 2025-11-17 |
| Notification, Known or Potential LSLLEAD AND COPPER RULE REVISIONS | Reporting | 2025-07-02 | Unaddressed |
| Monitoring, RegularArsenic | Monitoring & reporting | 2025-04-01 → 2025-06-30 | Resolvedreturned 2025-06-30 |
| Monitoring, RegularArsenic | Monitoring & reporting | 2025-04-01 → 2025-06-30 | Resolvedreturned 2025-06-30 |
| Public Notification Violation for NPDWR ViolationPublic Notice | Other | 2025-03-25 | Resolvedreturned 2025-11-17 |
| Monitoring, RegularArsenic | Monitoring & reporting | 2024-04-01 → 2024-06-30 | Resolvedreturned 2024-06-30 |
| Monitoring, RegularArsenic | Monitoring & reporting | 2024-04-01 → 2024-06-30 | Resolvedreturned 2024-06-30 |
| Monitoring, RegularGross Alpha, Excl. Radon and U | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, RegularCombined Uranium | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, RegularCombined Radium (-226 and -228) | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, RegularRadium-226 | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, RegularRadium-228 | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, RegularDICHLOROMETHANE | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, Regularo-Dichlorobenzene | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, Regularp-Dichlorobenzene | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, RegularVinyl chloride | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, Regular1,1-Dichloroethylene | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, Regulartrans-1,2-Dichloroethylene | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, Regular1,1,1-Trichloroethane | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, RegularCarbon tetrachloride | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, Regular1,2-Dichloropropane | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, RegularTrichloroethylene | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, Regular1,1,2-Trichloroethane | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, RegularBenzene | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
| Monitoring, RegularStyrene | Monitoring & reporting | 2022-07-01 → 2022-09-30 | Resolvedreturned 2022-09-30 |
Showing 25 of 84 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 PRESCOTT CITY OF
Well below the 15 ppb action level. In the most recent monitoring period on file (2023-01-01 to 2025-12-31), 90% of the homes PRESCOTT 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 |
|---|---|---|
| 2023-01-01 → 2025-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2020-01-01 → 2022-12-31 | 0 ppb | Well below the 15 ppb action level |
| 2017-01-01 → 2019-12-31 | 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 | 2.4 ppb | Well below the 15 ppb action level |
| 2006-01-01 → 2008-12-31 | 2 ppb | Well below the 15 ppb action level |
| 2003-01-01 → 2005-12-31 | 0 ppb | Well below the 15 ppb action level |
| 1999-01-01 → 2001-12-31 | 5 ppb | Below the action level, but detectable |
| 1993-01-01 → 1993-06-30 | 2 ppb | Well below the 15 ppb action level |
| 1992-07-01 → 1992-12-31 | 2.5 ppb | Well below the 15 ppb action level |
Source: ECHO SDWA bulk download (SDWA_LCR_SAMPLES.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-13)
EPA UCMR5 monitoring, 2023-05-16 to 2023-11-07 · 232 PFAS results at entry points to the distribution system
PFOA and PFOS measured at or above EPA's legal limit in at least one sample. Utilities have until 2029 (2031 under EPA's proposed extension) to comply with the 2024 PFAS rule, so a result above the MCL today is not yet a violation — but it is the number that matters for your health.
| Compound | Detects / samples | Max (ppt) | Reporting limit | EPA MCL |
|---|---|---|---|---|
| PFOA | 2 / 8 | 11.4 | 4 ppt | 4 ppt |
| PFOS | 2 / 8 | 8.7 | 4 ppt | 4 ppt |
| PFHxS | 4 / 8 | 6.5 | 3 ppt | 10 ppt |
| PFNA | 0 / 8 | < 4 | 4 ppt | 10 ppt |
| HFPO-DA | 0 / 8 | < 5 | 5 ppt | 10 ppt |
| PFBS | 2 / 8 | 7.5 | 3 ppt | hazard index only |
| PFHpA | 2 / 8 | 3.6 | 3 ppt | hazard index only |
| PFHxA | 5 / 8 | 12.6 | 3 ppt | hazard index only |
| PFPeA | 5 / 8 | 14.9 | 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 5 of 8 samples, max 18.9 µg/L. There is no federal limit for lithium.
What PFAS are and how to remove them → · Best filters for PFAS →
Source: UCMR5 occurrence data, EPA Data Summary July 2026 (UCMR5_All.txt)
EPA Six-Year Review 4 compliance samples for PRESCOTT CITY OF · finished water only · dated data, released 2024
These are the regulated-contaminant samples PRESCOTT CITY OF reported to its state between 2012 and 2019 — the most recent nationwide sample-level dataset EPA has published. Arsenic 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 | 7663 detects | 5.503 µg/L | 58.9 µg/L | 10 µg/LMCL | 1 of 76 samples over MCL |
| Nitrate (as N) | 46 | 1.401 mg/L | 2.78 mg/L | 10 mg/LMCL | Within MCL |
| Fluoride | 134 detects | 0.251 mg/L | 1.1 mg/L | 4 mg/LMCL | Within MCL |
| Chromium (total) | 1312 detects | 6.435 µg/L | 13 µg/L | 100 µg/LMCL | Within MCL |
| Uranium (combined) | 14 | 6.594 µg/L | 19.7 µg/L | 30 µg/LMCL | Within MCL |
| Radium-226/228 | 216 detects | 0.239 pCi/L | 1.2 pCi/L | 5 pCi/LMCL | Within MCL |
| Gross alpha | 146 detects | 0.608 pCi/L | 3.9 pCi/L | 15 pCi/LMCL | Within MCL |
| Total trihalomethanes (TTHM) | 26 | 4.6 µg/L | 15 µg/L | 80 µg/LMCL (LRAA) | Within MCL |
| Haloacetic acids (HAA5) | 285 detects | 0.273 µg/L | 2 µg/L | 60 µg/LMCL (LRAA) | Within MCL |
| Lead (tap samples) | 1005 detects | 0.293 µg/L | 22.6 µg/L | 15 µg/Laction level (90th percentile) | Reported, not scored (compliance is on the 90th percentile) |
| Copper (tap samples) | 100 | 45.114 µg/L | 114 µg/L | 1300 µg/Laction level (90th percentile) | Reported, not scored (compliance is on the 90th percentile) |
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)
A point-of-use (under-sink) system typically runs $200-$600 installed; whole-house treatment $1,000-$3,000+ depending on flow and what has to come out. Tell us where you are and a certified water-treatment installer serving Prescott will follow up - no obligation.
PRESCOTT CITY OF · 48,687 service lines inventoried · Q2 2026 snapshot
PRESCOTT CITY OF reports no confirmed lead service lines, but 24,150 lines (50%) have not yet been verified, so lead cannot be ruled out for those homes. Utilities must keep investigating unknown lines under EPA's Lead and Copper Rule Improvements.
Source: EPA SDWIS Service Line Inventory (Q2 2026) · PWS ID AZ0413045 · See all Arizona 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 Prescott 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 Prescott 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 Prescott 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 Prescott residents measured at their own tap (ZIPs 86301, 86303, 86313). 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 Prescott 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.
Prescott ranks #36 of 37 graded Arizona cities.
Deep-dive guides for the specific contaminants EPA data flagged in Prescott's water, with removal options for each.
Prescott, AZ tap water is legal to drink but grades F on EPA's records, mainly because of 1 health-based EPA violation in the last five years and PFOA or PFOS measured at or above the 4 ppt federal limit in 2023–2025 EPA sampling. A certified filter matched to those findings is a reasonable precaution.
PRESCOTT CITY OF's most recent Lead and Copper Rule result (2023-01-01 to 2025-12-31) 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.
Yes. EPA's UCMR5 sampling (2023-05-16 to 2023-11-07) detected PFBS, PFHpA, PFHxA, PFHxS, PFOA, PFOS, PFPeA, with PFOA or PFOS at or above the 4 ppt federal MCL. Reverse osmosis and certified activated-carbon filters reduce PFAS.
PRESCOTT CITY OF has 84 violations on file since 2016: 1 health-based in the last five years and 36 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
PRESCOTT CITY OF reports groundwater as its primary source and serves about 42,217 people (EPA PWSID AZ0413045).
We recommend one. Reverse osmosis or a PFAS-certified carbon filter addresses the PFAS result.
PFOA or PFOS was measured at or above EPA's 4 ppt limit in Prescott's UCMR5 sampling.
Best for Arsenic Removal
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Reverse osmosis removes arsenic to safe levels — the EPA-recommended treatment for arsenic (carbon pitchers don't remove it).
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Filters rated for arsenic reduction
Waterdrop's arsenic collection — arsenic needs RO-class treatment, and these are the systems built for it.
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Whole-house system — treats every tap at the source
For consistently poor water, a whole-home system filters every faucet, shower, and appliance — the permanent, install-once fix that goes beyond a single point-of-use filter.
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Based on contaminants detected in your water, these resources may be helpful:
Find the right filter for your Prescott water quality needs:
Tap water is one piece of the picture — our sister sites cover the rest for Prescott, AZ.
Predicted indoor radon by ZIP vs. the EPA 4 pCi/L action level.
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.