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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 DANVILLE CITY WATER WORKS • Updated September 2026
Grade A — based on EPA compliance records, lead testing and PFAS monitoring
DANVILLE CITY WATER WORKS has a clean recent record: no health-based violations in the last five years and no lead, PFAS or historical monitoring result that costs it more than a few points.
Yes — by EPA's records Danville, KY tap water is safe to drink and earns an A. The grade rests on no health-based EPA violations in the last five years and lead at 0 ppb (90th percentile, 2025) 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 Danville, KY tap water is safe to drink and earns an A. The grade rests on no health-based EPA violations in the last five years and lead at 0 ppb (90th percentile, 2025) 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.
DANVILLE CITY WATER WORKS'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.
No. None of the 116 UCMR5 PFAS results for DANVILLE CITY WATER WORKS (2024-03-26 to 2024-12-05) were at or above the reporting limit of roughly 3–5 ppt.
DANVILLE CITY WATER WORKS has 8 violations on file since 2016: 0 health-based in the last five years and 0 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
DANVILLE CITY WATER WORKS reports surface water as its primary source and serves about 32,600 people (EPA PWSID KY0110097).
Not on the strength of EPA's data for DANVILLE CITY WATER WORKS. 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 Danville 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.
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DANVILLE CITY WATER WORKS · 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. Older health-based violations (since 2016) are listed below for context.
| Violation | Category | Compliance period | Status |
|---|---|---|---|
| Maximum Contaminant Level Violation, AverageTotal Haloacetic Acids (HAA5) | MCL exceeded | 2016-07-01 → 2016-09-30 | Resolvedreturned 2016-09-30 |
| Maximum Contaminant Level Violation, AverageTotal Haloacetic Acids (HAA5) | MCL exceeded | 2016-04-01 → 2016-06-30 | Resolvedreturned 2016-06-10 |
| Maximum Contaminant Level Violation, AverageTotal Haloacetic Acids (HAA5) | MCL exceeded | 2016-01-01 → 2016-03-31 | Resolvedreturned 2016-03-31 |
| Public Notification Violation for NPDWR ViolationPublic Notice | Other | 2017-10-14 | Resolvedreturned 2018-05-03 |
| Public Notification Violation for NPDWR ViolationPublic Notice | Other | 2017-07-21 | Resolvedreturned 2018-03-05 |
| Consumer Confidence Report Inadequate ReportingConsumer Confidence Rule | Other | 2016-07-01 | Resolvedreturned 2018-06-26 |
| Failure Submit IDSE/Subpart V Plan RptTotal Haloacetic Acids (HAA5) | Monitoring & reporting | 2016-04-01 | Resolvedreturned 2016-07-01 |
| Failure Submit IDSE/Subpart V Plan RptTotal Haloacetic Acids (HAA5) | Monitoring & reporting | 2016-01-01 | Resolvedreturned 2016-09-29 |
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 DANVILLE CITY WATER WORKS
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 DANVILLE CITY WATER WORKS 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 | 2 ppb | Well below the 15 ppb action level |
| 2011-01-01 → 2013-12-31 | 14 ppb | Below the action level, but detectable |
| 2008-01-01 → 2010-12-31 | 5 ppb | Below the action level, but detectable |
| 2005-01-01 → 2007-12-31 | 2 ppb | Well below the 15 ppb action level |
| 2002-01-01 → 2004-12-31 | 5.2 ppb | Below the action level, but detectable |
| 1999-01-01 → 2001-12-31 | 2.2 ppb | Well below the 15 ppb action level |
| 1996-01-01 → 1998-12-31 | 4.1 ppb | Well below the 15 ppb action level |
| 1995-01-01 → 1995-12-31 | 7.4 ppb | Below the action level, but detectable |
| 1994-01-01 → 1994-12-31 | 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, 2024-03-26 to 2024-12-05 · 116 PFAS results at entry points to the distribution system
No PFAS detected. None of the 116 UCMR5 PFAS results for DANVILLE CITY WATER WORKS 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 / 4 | < 4 | 4 ppt | 4 ppt |
| PFOS | 0 / 4 | < 4 | 4 ppt | 4 ppt |
| PFHxS | 0 / 4 | < 3 | 3 ppt | 10 ppt |
| PFNA | 0 / 4 | < 4 | 4 ppt | 10 ppt |
| HFPO-DA | 0 / 4 | < 5 | 5 ppt | 10 ppt |
| PFBS | 0 / 4 | < 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.
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 DANVILLE CITY WATER WORKS · finished water only · dated data, released 2024
These are the regulated-contaminant samples DANVILLE CITY WATER WORKS reported to its state between 2012 and 2019 — the most recent nationwide sample-level dataset EPA has published. Haloacetic acids (HAA5) 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 | 80 detects | 0 µg/L | ND | 10 µg/LMCL | Not detected |
| Nitrate (as N) | 8 | 1.552 mg/L | 1.9 mg/L | 10 mg/LMCL | Within MCL |
| Fluoride | 16 | 0.819 mg/L | 1.1 mg/L | 4 mg/LMCL | Within MCL |
| Chromium (total) | 80 detects | 0 µg/L | ND | 100 µg/LMCL | Not detected |
| Uranium (combined) | 10 detects | 0 µg/L | ND | 30 µg/LMCL | Not detected |
| Radium-226/228 | 10 detects | 0 pCi/L | ND | 5 pCi/LMCL | Not detected |
| Gross alpha | 10 detects | 0 pCi/L | ND | 15 pCi/LMCL | Not detected |
| Total trihalomethanes (TTHM) | 129 | 41.932 µg/L | 79 µg/L | 80 µg/LMCL (LRAA) | Within MCL |
| Haloacetic acids (HAA5) | 129 | 44.285 µg/L | 139 µg/L | 60 µg/LMCL (LRAA) | 19 single samples over MCL; average within limit |
| Lead (tap samples) | 9525 detects | 2.4 µg/L | 96 µg/L | 15 µg/Laction level (90th percentile) | Reported, not scored (compliance is on the 90th percentile) |
| Copper (tap samples) | 10391 detects | 59.243 µg/L | 550 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)
DANVILLE CITY WATER WORKS · 11,067 service lines inventoried · Q2 2026 snapshot
DANVILLE CITY WATER WORKS reports no confirmed lead service lines, but 8,064 lines (73%) 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 KY0110097 · See all Kentucky lead service lines. We may earn a commission from filters and test kits, at no extra cost to you.
Surface-water systems draw from rivers, lakes or reservoirs and must filter and disinfect, which is why disinfection byproducts (TTHM, HAA5) are the readings to watch.
How to test your tap water and the treatment options that actually fit Danville 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 Danville 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 Danville 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 Danville residents measured at their own tap (ZIPs 40422). 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 Danville 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.
Danville ranks #1 of 23 graded Kentucky cities.
Yes — by EPA's records Danville, KY tap water is safe to drink and earns an A. The grade rests on no health-based EPA violations in the last five years and lead at 0 ppb (90th percentile, 2025) 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.
DANVILLE CITY WATER WORKS'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.
No. None of the 116 UCMR5 PFAS results for DANVILLE CITY WATER WORKS (2024-03-26 to 2024-12-05) were at or above the reporting limit of roughly 3–5 ppt.
DANVILLE CITY WATER WORKS has 8 violations on file since 2016: 0 health-based in the last five years and 0 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
DANVILLE CITY WATER WORKS reports surface water as its primary source and serves about 32,600 people (EPA PWSID KY0110097).
Not on the strength of EPA's data for DANVILLE CITY WATER WORKS. 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
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Your water already tests well — a simple carbon filter improves taste and catches trace contaminants.
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Tap water is one piece of the picture — our sister sites cover the rest for Danville, KY.
County radon prediction and EPA zone for homes around Danville.
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