Short answer: In the 2022–2024 records we hold for Hays, no listed result is above a legal limit. Also worth knowing: lithium sits above a screening level. 5 substances were detected and 26 were tested and not detected. The water is from City of Hays, serving 21,040 residents.
EPA lists this system for the city. Your water bill or annual water quality report names your actual supplier. Source: EPA SDWIS 2026Q2.
Groundwater
The treatment details are not on record.
Mains, then your building’s service line.
Plumbing inside the building is outside this record.
No measured result is above a legal limit; lithium sits above a screening level.
105 µg/L, sampled 2023-05-01 to 2023-11-07. EPA UCMR 5.
10 µg/L EPA health reference level (screening, not a legal limit).
Detected at up to 105 µg/L (above the 10 µg/L EPA health reference level; a screening level, not a legal limit).
Where it enters is not in this record.
Test your own tap first. To reduce it: Depends on the contaminant (The certifier's listing for each named contaminant).
3.8 ng/L, sampled 2023-05-01 to 2023-11-07. EPA UCMR 5.
2,000 ng/L EPA health advisory (screening, not a legal limit).
Detected at up to 3.8 ng/L (below the 2,000 ng/L EPA health advisory; a screening level, not a legal limit).
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 PFBS named on the listing).
6.1 ng/L, sampled 2023-05-01 to 2023-11-07. EPA UCMR 5.
400,000 ng/L Michigan EGLE state MCL (strictest US state): a state limit.
Detected at up to 6.1 ng/L (below the 400,000 ng/L historical comparison reference).
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 PFHxA named on the listing).
7 ng/L, sampled 2023-05-01 to 2023-11-07. EPA UCMR 5.
No federal limit is on record for it.
Detected at up to 7.0 ng/L. No federal or state limit exists for this substance; shown for transparency, not graded.
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 6:2 FTS named on the listing).
10.7 ng/L, sampled 2023-05-01 to 2023-11-07. EPA UCMR 5.
No federal limit is on record for it.
Detected at up to 10.7 ng/L. No federal or state limit exists for this substance; shown for transparency, not graded.
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 PFPeA named on the listing).
HAYS, CITY OF (EPA PWSID KS2005111) delivers groundwater to 21,040 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.
0health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
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.
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
Silver Lake Research
Lead, bacteria, nitrate, copper, iron, chlorine, hardness and pH
What it can't tell you: Each test gives a yes/no or a rough range, not a lab number, and it cannot detect PFAS or arsenic.
When your results arrive, read them here → · Compare every kit we list
Kansas Department of Health and Environment certifies the labs that test drinking water in Kansas. Find a certified lab in Kansas ↗ · What lab tests cost →
| Finding | Reference type | Technology | Certification to check |
|---|---|---|---|
| Lithium105 µg/L | Screening level | Depends on the contaminant | The certifier's listing for each named contaminant |
| Perfluorobutanesulfonic acid (PFBS)3.8 ng/L | Screening level | Reverse osmosis, or carbon certified for PFAS | NSF/ANSI 53 or 58, with PFBS named on the listing |
| Perfluorohexanoic acid (PFHxA)6.1 ng/L | State limit | Reverse osmosis, or carbon certified for PFAS | NSF/ANSI 53 or 58, with PFHxA named on the listing |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)7 ng/L | No federal limit | Reverse osmosis, or carbon certified for PFAS | NSF/ANSI 53 or 58, with 6:2 FTS named on the listing |
| Perfluoropentanoic acid (PFPeA)10.7 ng/L | No federal limit | Reverse osmosis, or carbon certified for PFAS | NSF/ANSI 53 or 58, with PFPeA named on the listing |
Each card names which Hays findings its current certification covers, and which it doesn't.
As an Amazon Associate, PurityMap earns from qualifying purchases. A product appears here only when a current certification record covers at least one identified concern; every concern stays listed. The retail offer is looked up afterwards and never changes which products appear or their order. Affiliate disclosure.
No product in our catalogue has verified certification for these concerns yet.
Older buildings may have lead service lines, solder or fixtures. Hays’ utility reported 178 service lines of unknown material in EPA’s inventory, so only a tap test tells you. Test first-draw water, then filter if needed.
4 of 29 PFAS tested were detected in Hays’ record (PFBS 3.8 ng/L, PFHxA 6.1 ng/L and 6:2 FTS 7 ng/L, and more). 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 Hays’ 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 Hays, PFAS were detected below their limits, and 6:2 FTS 7 ng/L and PFPeA 10.7 ng/L with no federal or state limit. HAYS, CITY OF (PWSID KS2005111) has a Purity Score of 100/100 (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 →
HAYS, CITY OF (PWS ID KS2005111) is the public water system on record for Hays, Kansas, serving about 21,040 people. Confirm the utility on your water bill before acting on a specific finding. Water utility →
Groundwater (primary source of record in EPA SDWIS). Water utility →
In EPA's UCMR 5 testing (2023-05-01 to 2023-11-07), PFBS was detected at 3.8 ng/L, below the 2,000 ng/L EPA health advisory and PFHxA was detected at 6.1 ng/L, below the 400,000 ng/L state limit. 6:2 FTS (7 ng/L) and PFPeA (10.7 ng/L) were also detected; they have no federal or state limit. What we found →
Lead is not in Hays'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 Hays holds 31 findings: 1 above a reference, 2 detected within the reference, 2 detected with no limit and 26 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: HAYS, CITY OF (KS2005111)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: HAYS, CITY OF (KS2005111)
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. HAYS, CITY OF · PWSID KS2005111 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
Full methodology →Start with the hot-or-cold tap check. Where City of Hays reported something related, it's shown below.
Lead at City of Hays: not detected (90th percentile, 2022–2024 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.