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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 LAFAYETTE WATER WORKS • Updated October 2026
Grade A — based on EPA compliance records, lead testing and PFAS monitoring
LAFAYETTE 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 Lafayette, IN 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 0.5 ppb (90th percentile, 2028) against the 15 ppb action level. The catch is lead pipes: Lafayette's water system reports 2,625 lead or galvanized service lines still in the ground in EPA's 2026 inventory, and lead leaches from those pipes after the water leaves the plant. If your home is on one, test at the tap or use a filter certified to NSF/ANSI 53 for lead.
Yes — by EPA's records Lafayette, IN 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 0.5 ppb (90th percentile, 2028) against the 15 ppb action level. The catch is lead pipes: Lafayette's water system reports 2,625 lead or galvanized service lines still in the ground in EPA's 2026 inventory, and lead leaches from those pipes after the water leaves the plant. If your home is on one, test at the tap or use a filter certified to NSF/ANSI 53 for lead.
LAFAYETTE WATER WORKS's most recent Lead and Copper Rule result (2026-01-01 to 2028-12-31) was 0.45 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 LAFAYETTE WATER WORKS (2023-02-22 to 2023-08-02) were at or above the reporting limit of roughly 3–5 ppt.
LAFAYETTE WATER WORKS has 6 violations on file since 2016: 0 health-based in the last five years and 3 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
LAFAYETTE WATER WORKS reports groundwater as its primary source and serves about 70,835 people (EPA PWSID IN5279013).
Not on the strength of EPA's data for LAFAYETTE 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 Lafayette 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 Lafayette'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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LAFAYETTE 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. The 3 violations on file in that window are monitoring or reporting paperwork issues, not measured contaminant exceedances.
| Violation | Category | Compliance period | Status |
|---|---|---|---|
| Report Sample Result/Fail Monitor (RTCR)Revised Total Coliform Rule | Reporting | 2026-01-01 | Resolvedreturned 2026-02-18 |
| Monitoring, Source Water (GWR)E. COLI | Monitoring & reporting | 2025-07-13 | Resolvedreturned 2025-07-16 |
| Monitoring, Routine (RTCR)Revised Total Coliform Rule | Monitoring | 2025-07-01 → 2025-07-31 | Resolvedreturned 2025-07-31 |
| Report Sample Result/Fail Monitor (RTCR)Revised Total Coliform Rule | Reporting | 2021-05-01 | Resolvedreturned 2021-06-25 |
| Monitoring and Reporting (DBP)TTHM | Monitoring & reporting | 2019-01-01 → 2019-03-31 | Resolvedreturned 2019-03-31 |
| Monitoring and Reporting (DBP)Total Haloacetic Acids (HAA5) | Monitoring & reporting | 2019-01-01 → 2019-03-31 | Resolvedreturned 2019-03-31 |
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 LAFAYETTE WATER WORKS
Well below the 15 ppb action level. In the most recent monitoring period on file (2026-01-01 to 2028-12-31), 90% of the homes LAFAYETTE WATER WORKS sampled had lead at or below 0.45 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 |
|---|---|---|
| 2026-01-01 → 2028-12-31 | 0.45 ppb | Well below the 15 ppb action level |
| 2023-01-01 → 2025-12-31 | 3.8 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 | 1.1 ppb | Well below the 15 ppb action level |
| 2014-01-01 → 2016-12-31 | 1.1 ppb | Well below the 15 ppb action level |
| 2013-01-01 → 2013-12-31 | 0.3 ppb | Well below the 15 ppb action level |
| 2012-01-01 → 2012-12-31 | 0.1 ppb | Well below the 15 ppb action level |
| 2011-01-01 → 2011-12-31 | 2 ppb | Well below the 15 ppb action level |
| 2008-01-01 → 2010-12-31 | 2 ppb | Well below the 15 ppb action level |
| 2010-01-01 → 2010-06-30 | 2 ppb | Well below the 15 ppb action level |
| 2009-07-01 → 2009-12-31 | 2 ppb | Well below the 15 ppb action level |
| 2005-01-01 → 2007-12-31 | 5 ppb | Below the action level, but detectable |
Copper 90th percentile: 1.7 mg/L (1992-07-01 → 1992-12-31); action level 1.3 mg/L.
Source: ECHO SDWA bulk download (SDWA_LCR_SAMPLES.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-13)
EPA UCMR5 monitoring, 2023-02-22 to 2023-08-02 · 116 PFAS results at entry points to the distribution system
No PFAS detected. None of the 116 UCMR5 PFAS results for LAFAYETTE 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.
Lithium (also monitored under UCMR5, not a PFAS): detected in 4 of 4 samples, max 12.8 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 LAFAYETTE WATER WORKS · finished water only · dated data, released 2024
These are the regulated-contaminant samples LAFAYETTE WATER WORKS reported to its state between 2012 and 2019 — the most recent nationwide sample-level dataset EPA has published. Every scored contaminant stayed within its Maximum Contaminant Level (MCL) and averaged below 80% of the limit. Treat this as history, not today's tap water.
| Contaminant | Samples | Average | Max | EPA limit | Status |
|---|---|---|---|---|---|
| Arsenic | 41 detects | 0.25 µg/L | 1 µg/L | 10 µg/LMCL | Within MCL |
| Nitrate (as N) | 2019 detects | 0.96 mg/L | 1.83 mg/L | 10 mg/LMCL | Within MCL |
| Fluoride | 4 | 0.449 mg/L | 0.7 mg/L | 4 mg/LMCL | Within MCL |
| Chromium (total) | 42 detects | 0.7 µg/L | 1.6 µg/L | 100 µg/LMCL | Within MCL |
| Uranium (combined) | 4 | 1.562 µg/L | 1.695 µg/L | 30 µg/LMCL | Within MCL |
| Gross alpha | 40 detects | 0 pCi/L | ND | 15 pCi/LMCL | Not detected |
| Total trihalomethanes (TTHM) | 11585 detects | 1.826 µg/L | 16 µg/L | 80 µg/LMCL (LRAA) | Within MCL |
| Haloacetic acids (HAA5) | 11555 detects | 1.445 µg/L | 6 µg/L | 60 µg/LMCL (LRAA) | Within MCL |
| Lead (tap samples) | 6010 detects | 0.347 µg/L | 8 µg/L | 15 µg/Laction level (90th percentile) | Reported, not scored (compliance is on the 90th percentile) |
| Copper (tap samples) | 6058 detects | 251.4 µg/L | 2020 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)
LAFAYETTE WATER WORKS · 30,838 service lines inventoried · Q2 2026 snapshot
LAFAYETTE WATER WORKS reports 2,625 service lines that are lead or galvanized-requiring-replacement (8.5% of the lines it has inventoried), plus 67 lines whose material is still unknown. A lead service line is the pipe between the water main and a building, so treated water can pick up lead after it leaves the plant — which city-level testing does not capture. Under EPA's Lead and Copper Rule Improvements, utilities must replace lead lines within 10 years starting in 2027.
Source: EPA SDWIS Service Line Inventory (Q2 2026) · PWS ID IN5279013 · See all Indiana 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 Lafayette 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 Lafayette 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 Lafayette 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 Lafayette residents measured at their own tap (ZIPs 47901, 47904, 47905). 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 Lafayette 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.
Lafayette ranks #14 of 32 graded Indiana cities.
Deep-dive guides for the specific contaminants EPA data flagged in Lafayette's water, with removal options for each.
Yes — by EPA's records Lafayette, IN 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 0.5 ppb (90th percentile, 2028) against the 15 ppb action level. The catch is lead pipes: Lafayette's water system reports 2,625 lead or galvanized service lines still in the ground in EPA's 2026 inventory, and lead leaches from those pipes after the water leaves the plant. If your home is on one, test at the tap or use a filter certified to NSF/ANSI 53 for lead.
LAFAYETTE WATER WORKS's most recent Lead and Copper Rule result (2026-01-01 to 2028-12-31) was 0.45 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 LAFAYETTE WATER WORKS (2023-02-22 to 2023-08-02) were at or above the reporting limit of roughly 3–5 ppt.
LAFAYETTE WATER WORKS has 6 violations on file since 2016: 0 health-based in the last five years and 3 monitoring or reporting violations in that window. Monitoring violations are paperwork lapses, not measured contamination.
LAFAYETTE WATER WORKS reports groundwater as its primary source and serves about 70,835 people (EPA PWSID IN5279013).
Not on the strength of EPA's data for LAFAYETTE 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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