Indianapolis, IN tap water: what’s in it in 2026
Reviewed by Joe Letorney, 30-year water treatment expert · Former WQA Certified Water Treatment Specialist (CWS), Level VI
See best water filters for lead removal and what filters remove PFAS.
Serving 880K residents via Citizens Energy Group · Indianapolis, IN drinking water is supplied by Citizens Energy Group. EPA and public water system monitoring commonly focus on issues such as Disinfection byproducts, Agricultural nitrates, Aging infrastructure. Finished water chemistry is only half the story: building plumbing, meters, and premise piping can add lead, copper, or particulates after the public water system meets treatment goals at the plant fence. Compare public water system-wide themes with ZIP-level monitoring and your annual Consumer Confidence Report for the service area that includes your home.
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WaterCheckup Safety Score — an independent index from EPA public data and our formula. Not your utility’s official water quality rating, an EPA compliance grade, or a test of water at your tap. How we score →
Indianapolis water currently shows no major violations in EPA monitoring data. That said, your home's internal plumbing can add lead or other contaminants after water leaves the treatment plant — especially in homes built before 1986.
Indianapoliswater may meet federal EPA limits while still showing contaminants above independent health guidelines (EWG, state advisories). EPA MCLs are often set on treatment feasibility — not a "zero risk" threshold. Compare levels below to health guidelines and state/U.S. utility averages, then see which filter technologies address your profile.
EPA UCMR5 PFAS plus utility/EWG averages from our contaminant bundle. Run a ZIP report for live SDWIS samples at your address.
EWG health guideline: 0.15 ppb
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 30.97 ppb · IN utility avg: 33.94 ppb
Removes with: RO · Carbon
EWG health guideline: 0.06 ppb (HAA5)
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 21.57 ppb · IN utility avg: 20.92 ppb
Removes with: RO · Carbon
Can impair thyroid function — most concerning during pregnancy and childhood.
Removes with: RO · Carbon
EWG health guideline: 700 ppb
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 43.45 ppb · IN utility avg: 87.37 ppb
Removes with: RO · Carbon · Ion exchange
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 23.64 ppb · IN utility avg: 24.09 ppb
Removes with: RO · Carbon
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 17.82 ppb · IN utility avg: 16.64 ppb
Removes with: RO · Carbon
EWG health guideline: 0.06 ppb
THM component linked to cancer and reproductive harm with long-term exposure.
Removes with: RO · Carbon
PFAS (“forever chemicals”) persist in the body. NSF 58 reverse osmosis or NSF P473-certified filters remove PFAS at the tap — standard pitchers do not.
Removes with: RO · Carbon
PFAS (“forever chemicals”) persist in the body. NSF 58 reverse osmosis or NSF P473-certified filters remove PFAS at the tap — standard pitchers do not.
Removes with: RO · Carbon
PFAS (“forever chemicals”) persist in the body. NSF 58 reverse osmosis or NSF P473-certified filters remove PFAS at the tap — standard pitchers do not.
Removes with: RO · Carbon
PFAS (“forever chemicals”) persist in the body. NSF 58 reverse osmosis or NSF P473-certified filters remove PFAS at the tap — standard pitchers do not.
Removes with: RO · Carbon
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 2.35 ppb · IN utility avg: 3.41 ppb
Removes with: RO · Carbon
EWG health guideline: 0.1 ppb
THM component linked to cancer and harm to fetal development.
Removes with: RO · Carbon
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 3.00 ppt · IN utility avg: 4.08 ppt
Removes with: RO
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 2.85 ppt · IN utility avg: 1.42 ppt
Removes with: RO
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 0.49 ppm · IN utility avg: 0.60 ppm
Removes with: RO · Ion exchange
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 0.53 pCi/L · IN utility avg: 0.76 pCi/L
Removes with: RO · Ion exchange
EWG health guideline: 0.14 ppm
EWG Tap Water Atlas utility average (2021–2023) · U.S. utility avg (EWG Atlas sample): 1.10 ppm · IN utility avg: 1.20 ppm
Removes with: RO
U.S. and state averages from EWG Tap Water Atlas utilities in our database. For your exact tap, use a ZIP report — home plumbing can differ from utility averages.
Indy water comes from the White River and Fall Creek -- both receive significant agricultural runoff.
Nitrates from farming are a persistent concern in Indiana's water supply.
Citizens Energy has logged THM and HAA5 violations in past years.
Certified RO removes both nitrates and DBPs -- the main concerns for Indianapolis residents.
Source: EPA UCMR5 national monitoring dataset · Testing period 2023–2025 · MCL = Maximum Contaminant Level (legally enforceable limit) · Health limit = EPA health advisory threshold
Reference matrix — not specific brands. NSF-certified carbon blocks, reverse osmosis (NSF 58), and ion-exchange softeners address different contaminants. Product picks below match this profile.
Indianapolisutility data is a strong baseline — but lead often comes from your home's pipes, and PFAS can vary by neighborhood. Choose certified lab testing for certainty, or skip straight to NSF-certified filters matched to this profile.
SimpleLab Tap Score mail-in panels test PFAS, lead, nitrates, bacteria, and 100+ contaminants at your kitchen tap. Results in about a week — then pick filtration with real numbers, not guesses.
Tap Score City Test — from $89 →Accredited labs · Best if you have old plumbing, pregnancy, or want proof before installing RO
Get NSF 58 / NSF 53 picks matched to Indianapolis's PFAS, lead, and disinfection byproduct profile — reviewed by a 30-year water treatment expert.
Take the 3-question filter quiz →Best when contaminants are already flagged above and you want the right RO or pitcher today
Certified Filter Recommendations
Matched to what's actually in your water
COMMON QUESTIONS
Is Indianapolis tap water safe to drink in 2026?
Indianapolis water meets EPA legal standards, but meeting legal standards is not the same as being free of health concerns. EPA limits are set based on treatment feasibility, not always on what independent scientists consider safe. The main concerns for Indianapolis residents are disinfection byproducts and agricultural nitrates. Enter your ZIP above to see the full violation history for your specific water system.
Does Indianapolis water have PFAS?
EPA UCMR5 monitoring data for Indianapolis (water system IN5271014) is shown above. PFAS — sometimes called "forever chemicals" — are synthetic compounds that don't break down in the body. Only reverse osmosis systems or NSF 58-certified carbon block filters reliably remove PFAS from tap water. Standard pitcher filters do not remove PFAS.
Does Indianapolis water have lead?
Lead in tap water almost always comes from the pipes inside your home or building, not the treatment plant. Homes built before 1986 in Indianapolis are most at risk because they may have lead solder, brass fittings, or lead service lines. The EPA has no safe level for lead in children. An NSF/ANSI 53-certified filter or reverse osmosis system removes lead at the tap.
What water filter is best for Indianapolis?
For Indianapolis's water profile — disinfection byproducts, agricultural nitrates — a reverse osmosis system addresses the widest range of contaminants. Under-sink RO (Waterdrop G3P600, Aquasana SmartFlow) is the gold standard for homeowners. Renters can use a countertop RO like the Waterdrop K19-S Countertop RO — zero installation required. Clearly Filtered pitchers are the best non-RO option for PFAS and lead.
How do I get my Indianapolis water tested?
For the most accurate results for your specific tap, use a certified mail-in lab test rather than relying on city-wide data. SimpleLab Tap Score tests for 100+ contaminants including PFAS, lead, arsenic, and nitrates. Results come with a detailed health assessment and filter recommendations. City-wide EPA data like what you see above is a strong baseline, but your home's plumbing can add contaminants after the water leaves the treatment plant.
As of October 2024, all US public water systems must publish a public inventory of their lead service lines — the pipes connecting the water main to your home. Even if your public water system water tests clean at the treatment plant, lead can leach from these pipes into your tap. Homes built before 1986 are most at risk.
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City-wide data is just the start. Enter your ZIP to see your exact water system's EPA report, PFAS levels, and violation history — then get the right filter for your home.
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Reviewed by Joe Letorney, 30-year water treatment expert · Former WQA Certified Water Treatment Specialist (CWS), Level VI