Short answer: In the 2023–2025 records we hold for Greenville, PFOS had a sample above a 2024 EPA limit (not a violation: the limit is judged on a yearly average, due 2029), and a health-based violation is on record (EPA SDWIS). Everything else measured is within its reference or not detected. 2 substances were detected and 29 were tested and not detected. The water is from Greenville City PWS, serving 13,227 residents.
Your water bill or annual water quality report names your actual supplier.
Surface water
The treatment details are not on record.
Mains, then your building’s service line.
Plumbing inside the building is outside this record.
PFOS had a sample above a 2024 EPA limit (not a violation: the limit is judged on a yearly average, due 2029); everything else measured is within its reference or not detected.
6.3 ng/L, sampled 2025-03-17 to 2025-09-03. EPA UCMR 5.
4.0 ng/L federal MCL (2024): a legal limit. That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. EPA health goal (MCLG): 0.
One EPA sample measured 6.3 ng/L, above the 4 ng/L limit EPA set in 2024. That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation.
Comes with the source water; home plumbing does not add it.
Test your own tap first. To reduce it: Reverse osmosis, or carbon certified for PFAS (NSF/ANSI 53 or 58 (PFOA/PFOS)).
5.9 ng/L, sampled 2025-03-17 to 2025-09-03. EPA UCMR 5.
10 ng/L federal MCL (2024): a legal limit. That limit is judged on a yearly average, and water systems have until 2029 to meet it.
Detected at up to 5.9 ng/L (below the 10 ng/L limit EPA set in 2024). That limit is judged on a yearly average, and water systems have until 2029 to meet it.
Comes with the source water; home plumbing does not add it.
Test your own tap first. To reduce it: Reverse osmosis, or carbon certified for PFAS (NSF/ANSI 53 or 58, with PFHxS named on the listing).
GREENVILLE CITY PWS (EPA PWSID OH1900714) delivers surface water to 13,227 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
1health-based violation in the last 10 years
From EPA SDWIS. Counted once per contaminant per year, as in the Track record score.
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
Every filing is listed; the Track record score counts at most one per contaminant per year.
Resolved
to Resolved
The record describes water leaving treatment and samples across the system. Pipes, solder and fixtures inside a building can add lead the record can’t see, especially in older buildings with lead service lines.
Test your waterMeasured in this report
Sampled across the system
Not in this record
Only a tap test measures it
Know what comes from your tap, starting with a first-draw lead sample.
Compare each result with its named reference in our test reader.
Choose a technology certified for what your test found.
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
When your results arrive, read them here → · Compare every kit we list
Ohio Environmental Protection Agency certifies the labs that test drinking water in Ohio. Find a certified lab in Ohio ↗ · What lab tests cost →
| Finding | Reference type | Technology | Certification to check |
|---|---|---|---|
| Perfluorooctanesulfonic acid (PFOS)6.3 ng/L | Federal MCL | Reverse osmosis, or carbon certified for PFAS | NSF/ANSI 53 or 58 (PFOA/PFOS) |
| Perfluorohexanesulfonic acid (PFHxS)5.9 ng/L | Federal MCL | Reverse osmosis, or carbon certified for PFAS | NSF/ANSI 53 or 58, with PFHxS named on the listing |
| Lead service lines355 lead, 123 galvanized on record (EPA inventory, 2026Q2) | Not a tap measurement | Lead-certified carbon filter, or reverse osmosis | NSF/ANSI 53 (lead) |
★ Best choice: Aquasana Claryum 2-Stage Under-Sink Filter (AQ-5200), certified for PFOS and lead.
| Pick | Product | Details and price | Certification | Why it’s listed | Link |
|---|---|---|---|---|---|
| ★ Best choice | Under-sinkAquasana Claryum 2-Stage Under-Sink Filter (AQ-5200) | TreatsPFOS and leadPrice$$ | Certified for PFOS (NSF/ANSI 53, WQA) | Why it’s listed: its current certification names PFOS, found in Greenville’s record.See the evidence | Check price on Amazon |
| Also good | Under-sinkAquasana Claryum 3-Stage Max Flow Under-Sink Filter (AQ-6300M) | TreatsPFOS and leadPrice$$ | Certified for PFOS (NSF/ANSI 53, WQA) | Why it’s listed: its current certification names PFOS, found in Greenville’s record.See the evidence | Check price at Aquasana |
| Also good | CountertopAquasana Clean Water Machine Countertop Filter (AQ-CWM2) | TreatsPFOS and leadPrice$$ | Certified for PFOS (NSF/ANSI 53, WQA) | Why it’s listed: its current certification names PFOS, found in Greenville’s record.See the evidence | Check price at Aquasana |
| Pick | Product | Details and price | Certification | Why it’s listed | Link |
|---|---|---|---|---|---|
| Also good | Reverse osmosisSmartFlow® Reverse Osmosis | TreatsPFOS and leadTechnologyReverse osmosisPrice$$$ | Certified for PFOS (NSF/ANSI 53 (includes P473), WQA) | Why it’s listed: its current certification names PFOS, found in Greenville’s record.See the evidence | Check price at Aquasana |
| Also good | Under-sinkWaterdrop G3P600 Tankless Reverse-Osmosis System | TreatsPFOS and leadPrice$$$ | Certified for PFOS (NSF/ANSI 53, IAPMO) | Why it’s listed: its current certification names PFOS, found in Greenville’s record.See the evidence | Check price at Waterdrop |
| Also good | Under-sinkWaterdrop G3P800 Tankless Reverse-Osmosis System | TreatsPFOS and leadPrice$$$ | Certified for PFOS (NSF/ANSI 53, IAPMO) | Why it’s listed: its current certification names PFOS, found in Greenville’s record.See the evidence | Check price at Waterdrop |
| Also good | CountertopAquaTru Carafe Countertop Reverse-Osmosis Purifier (AT100) | TreatsPFOS and leadPrice$$$ | Certified for PFOS (NSF/ANSI 53, IAPMO) | Why it’s listed: its current certification names PFOS, found in Greenville’s record.See the evidence | Check price on Amazon |
| Also good | CountertopAquaTru Classic Countertop Reverse-Osmosis Purifier (AT2000) | TreatsPFOS and leadPrice$$$ | Certified for PFOS (NSF/ANSI 53, IAPMO) | Why it’s listed: its current certification names PFOS, found in Greenville’s record.See the evidence | Check price on Amazon |
| Also good | CountertopPatriot Pure Ultimate Water Filtration System | TreatsPFOS and leadPrice$$ | Certified for PFOS (NSF/ANSI 53, NSF, IAPMO) | Why it’s listed: its current certification names PFOS, found in Greenville’s record.See the evidence | Check price on Amazon |
| Also good | Reverse osmosisiSpring RCC7AK Alkaline Reverse Osmosis SystemUse code REFISPRING at checkout: 10% off your first iSpring order. | TechnologyReverse osmosisPrice$$ | Brand lab-tested for PFAS, not independently certified for PFOS and PFHxS | See the evidence | Check price at iSpring |
| Also good | Reverse osmosisiSpring RO5004F Tankless Reverse Osmosis System with UVUse code REFISPRING at checkout: 10% off your first iSpring order. | TechnologyReverse osmosisPrice$$$ | Brand lab-tested for PFAS, not independently certified for PFOS and PFHxS | See the evidence | Check price at iSpring |
| Also good | Reverse osmosisWaterdrop X12 Reverse Osmosis System | TechnologyReverse osmosisPrice$$$$ | Brand lab-tested for PFAS, not independently certified for PFOS and PFHxS | See the evidence | Check price at Waterdrop |
★ Best choice: HealthShield™, certified for PFOS and PFHxS.
| Pick | Product | Details and price | Certification | Why it’s listed | Link |
|---|---|---|---|---|---|
| ★ Best choice | Whole-houseHealthShield™ | TreatsPFOS and PFHxSPrice$$$$ | Certified for PFOS and PFHxS (NSF/ANSI 53, WQA) | Why it’s listed: its current certification names PFOS and PFHxS, found in Greenville’s record.See the evidence | Check price at Aquasana |
| $ Budget pick | Whole-houseiSpring WGB32B-PFKS PFAS & Heavy Metals Whole House FilterUse code REFISPRING at checkout: 10% off your first iSpring order. | Price$$$ | Brand lab-tested for PFAS, not independently certified for PFOS and PFHxS | See the evidence | Check price at iSpring |
Also: lead picks →
PurityMap earns a commission from these links. "Best choice" and "Budget pick" go to certified products first; commission never decides them. As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.
Lead service lines
Greenville City PWS reported 355 lead and 123 galvanized service lines to replace in EPA’s inventory (2026Q2). Many utilities replace these lines for free or share the cost. Ask Greenville City PWS whether your home’s line is on its list before you pay anyone.
Local help
Call to be connected with a local plumbing provider about lead service lines, repiping or fixture replacement.
Older buildings may have lead service lines, solder or fixtures. Greenville’s utility reported 355 lead and 123 galvanized service lines in EPA’s inventory. Test first-draw water, then filter if needed.
2 of 29 PFAS tested were detected in Greenville’s record (PFOS 6.3 ng/L and PFHxS 5.9 ng/L); 1 above its limit. If PFAS matters to you, a filter certification names each compound it covers.
Most utilities keep chlorine or chloramine in the pipes. A carbon filter certified for taste and odor reduces either; your utility can tell you which it uses.
Your utility’s annual water quality report usually lists hardness; a test strip also measures it.
Reverse osmosis reduces many dissolved contaminants, including lead and minerals, at a single faucet, with some water sent to drain.
Get one email when Greenville’s record changes.
One email when a new sampling round is published, a result moves above or below its reference, or the system's score changes.PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Greenville, PFOS 6.3 ng/L was measured in one EPA sample, above the 4 ng/L limit EPA set in 2024 (not a violation: the limit is judged on a yearly average, due 2029). GREENVILLE CITY PWS (PWSID OH1900714) has a Purity Score of 65/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap. What we found →
GREENVILLE CITY PWS (PWS ID OH1900714) is the public water system on record for Greenville, Ohio, serving about 13,227 people. Confirm the utility on your water bill before acting on a specific finding. Water utility →
Surface water (primary source of record in EPA SDWIS). Water utility →
Yes. In EPA's UCMR 5 testing (2025-03-17 to 2025-09-03), PFOS was measured at 6.3 ng/L in one EPA sample, above the 4 ng/L limit EPA set in 2024. That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFHxS was detected below its limit. Reverse osmosis and filters certified to NSF/ANSI 53 for PFOA/PFOS reduce them at the tap. What we found →
Lead is not in Greenville's current published record. Lead usually enters from a building's own pipes and fixtures, so a certified home test is the way to know yours. Your household →
PurityMap's current record for Greenville holds 31 findings: 1 above a reference, 1 detected within the reference and 29 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass. Records →
UCMR5 Analytical Results
UCMR5 Analytical Results: GREENVILLE CITY PWS (OH1900714)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: GREENVILLE CITY PWS (OH1900714)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
EPA SDWIS, EPA UCMR 5 and utility reports, each dated and linked.
Units converted to one basis; a non-detect kept distinct from zero.
Each result tagged by reference type: MCL, action level, screening level or aesthetic.
Every value sits against its own reference, never a blended one.
Measured subjects summarised at the water-system level; an open health-based violation caps the score.
Treatment is matched to what was found; a product is called certified only when its current certification names it.
What the Purity Score means: a summary of this water system’s published record, capped while a health-based violation is open. It is not a test of any tap. GREENVILLE CITY PWS · PWSID OH1900714 · Purity Score 65/100 (Fair) · Confidence: moderate · Assessed at the water-system level
Full methodology →Start with the hot-or-cold tap check. Where Greenville City PWS reported something related, it's shown below.
Lead at Greenville City PWS: not detected (90th percentile, 2023–2025 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.