WaterCheck Ireland

Killarney Tap Water Quality

EPA monitoring records for Water Supply Zones mapped to Killarney contain 2,476 monitoring results across 68 parameters in 2025.

The separate EPA exceedance dataset contains 9 listed exceedance records across 6 parameters.

The most frequently listed were Colony Count @ 22°C (2), Iron (2) and pH (2).

These are historical monitoring records and do not confirm the current status of water at a specific address. Current notices are maintained by Uisce Éireann.

Latest monitoring year
2025
Page updated
September 2026
Water Supply Zones
2
2,476Monitoring results
68Parameters tested
9EPA-listed exceedances
125Samples

Monitoring results apply to the Water Supply Zones as a whole and may include sampling locations outside Killarney.

Selected monitoring data

Key drinking water parameters

Parameters are shown when measurements are available. Text-only and censored values remain unchanged in the detailed history.

Lead

2025 median—
2025 maximum—
Measurements in 202514

0 EPA-listed exceedances in 2025.

View parameter history

Individual numeric measurements from 2021–2025. Text-only and censored results are retained in the history JSON and are not plotted as numbers.

Open this chart to load the measurements.

Numeric resultEPA-listed exceedance

6 numeric measurements available; 55 text-only records retained in JSON.

Nitrate

2025 median—
2025 maximum—
Measurements in 202514

0 EPA-listed exceedances in 2025.

View parameter history

Individual numeric measurements from 2021–2025. Text-only and censored results are retained in the history JSON and are not plotted as numbers.

Open this chart to load the measurements.

Numeric resultEPA-listed exceedance

0 numeric measurements available; 64 text-only records retained in JSON.

E. coli

2025 median0
2025 maximum0
Measurements in 2025124

0 EPA-listed exceedances in 2025.

View parameter history

Individual numeric measurements from 2021–2025. Text-only and censored results are retained in the history JSON and are not plotted as numbers.

Open this chart to load the measurements.

Numeric resultEPA-listed exceedance

592 numeric measurements available; 0 text-only records retained in JSON.

Coliform Bacteria

2025 median0 100ml
2025 maximum2 100ml
Measurements in 2025124

1 EPA-listed exceedances in 2025.

View parameter history

Individual numeric measurements from 2021–2025. Text-only and censored results are retained in the history JSON and are not plotted as numbers.

Open this chart to load the measurements.

Numeric resultEPA-listed exceedance

592 numeric measurements available; 0 text-only records retained in JSON.

Fluoride

2025 median0.75
2025 maximum0.9
Measurements in 202514

0 EPA-listed exceedances in 2025.

View parameter history

Individual numeric measurements from 2021–2025. Text-only and censored results are retained in the history JSON and are not plotted as numbers.

Open this chart to load the measurements.

Numeric resultEPA-listed exceedance

64 numeric measurements available; 0 text-only records retained in JSON.

Iron

2025 median22 ug/l
2025 maximum277 ug/l
Measurements in 2025123

2 EPA-listed exceedances in 2025.

View parameter history

Individual numeric measurements from 2021–2025. Text-only and censored results are retained in the history JSON and are not plotted as numbers.

Open this chart to load the measurements.

Numeric resultEPA-listed exceedance

267 numeric measurements available; 303 text-only records retained in JSON.

Arsenic

2025 median2
2025 maximum2
Measurements in 202514

0 EPA-listed exceedances in 2025.

View parameter history

Individual numeric measurements from 2021–2025. Text-only and censored results are retained in the history JSON and are not plotted as numbers.

Open this chart to load the measurements.

Numeric resultEPA-listed exceedance

1 numeric measurements available; 63 text-only records retained in JSON.

20252,476 results · 9 listed exceedances
Total results — independent scale
0 1,238 2,476 2,121 2021 2,091 2022 2,216 2023 2,151 2024 2,476 2025
Listed exceedances per 1,000 results — independent scale
0.000 2.031 4.061 1.414 2021 3.826 2022 4.061 2023 0.930 2024 3.635 2025

This is our descriptive frequency: listed exceedance records divided by result records, multiplied by 1,000. It is not an official EPA compliance rate. Differences in sampling volume and parameters tested affect comparisons. A missing denominator is shown as unavailable.

Monitoring history by year
YearResultsSamplesParametersListed exceedancesPer 1,000 results
20212,1211316431.414
20222,0911116483.826
20232,2161146494.061
20242,1511126520.930
20252,4761256893.635

Year-to-year detail

2025 compared with 2024

Changes describe dataset volumes only. The comparison uses the previous available year.

Results
20242,151
20252,476
+325
Listed exceedances
20242
20259
+7
Samples
2024112
2025125
+13
Parameters
202465
202568
+3

Parameters with EPA-listed exceedances

Values and limits are reproduced as reported. Different unit/limit pairs are shown separately.

Colony Count @ 22°C

2 listed exceedance records / 109 tests1.83%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
300 1ml
Reported limit
100 1ml
Records with this unit/limit pair
2
Latest exceedance
08 Dec 2025

Iron

2 listed exceedance records / 123 tests1.63%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
277 ug/l
Reported limit
200 ug/l
Records with this unit/limit pair
2
Latest exceedance
12 Nov 2025

pH

2 listed exceedance records / 124 tests1.61%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
9.8 pH Units
Reported limit
9.5 pH Units
Records with this unit/limit pair
2
Latest exceedance
16 Jun 2025

Coliform Bacteria

1 listed exceedance records / 124 tests0.81%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
2 100ml
Reported limit
0 100ml
Records with this unit/limit pair
1
Latest exceedance
06 Oct 2025

Glyphosate

1 listed exceedance records / 14 tests7.14%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
5.78 µg/l
Reported limit
0.1 µg/l
Records with this unit/limit pair
1
Latest exceedance
07 Apr 2025

Pesticides - Total

1 listed exceedance records / 14 tests7.14%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
5.78 ug/l
Reported limit
0.5 ug/l
Records with this unit/limit pair
1
Latest exceedance
07 Apr 2025

Across the year

When were listed exceedances recorded?

Each point represents one listed exceedance record. Records on the same date remain separate.

Colony Count @ 22°C08 Dec 2025
300 1mlReported result
100 1mlReported limit
Central Regional - Lough Guitane (H) 400FWater supply
JanFebMarAprMayJunJulAugSepOctNovDecColiform BacteriaColony Count @ 22°CGlyphosateIronPesticides - TotalpH08 Dec 2025 — Colony Count @ 22°C: 300 1ml; reported limit 100; Central Regional - Lough Guitane (H) 400F; sample 28389312 Nov 2025 — Iron: 232 ug/l; reported limit 200; Central Regional - Lough Guitane (H) 400F; sample 28125106 Oct 2025 — Coliform Bacteria: 2 100ml; reported limit 0; Central Regional - Lough Guitane (H) 400F; sample 27840030 Jun 2025 — Iron: 277 ug/l; reported limit 200; Central Regional - Lough Guitane (H) 400F; sample 27156816 Jun 2025 — pH: 9.8 pH Units; reported limit 9.5; Central Regional - Lough Guitane (H) 400F; sample 27056914 Apr 2025 — pH: 9.8 pH Units; reported limit 9.5; Central Regional - Lough Guitane (H) 400F; sample 26706107 Apr 2025 — Glyphosate: 5.78 µg/l; reported limit 0.1; Mid Kerry : Gearha (H) 300A; sample 26661607 Apr 2025 — Pesticides - Total: 5.78 ug/l; reported limit 0.5; Mid Kerry : Gearha (H) 300A; sample 26661620 Jan 2025 — Colony Count @ 22°C: 185 1ml; reported limit 100; Mid Kerry : Gearha (H) 300A; sample 262711

9 listed exceedance records across 6 parameters in 2025.

Your mapped supply

Water supply

Every Water Supply Zone used for this page's headline figures is included. Geographic overlaps are reported separately and are not added together or weighted by population.

Central Regional: Lough Guitane (H) 400F

77.55% geographic overlap with the Killarney Built Up Area.

Technical mapping details
EDEN code
1300PUB1016
Local authority
Kerry
Page totals
Included
Spatial rank
1
Historical EPA scheme
Available
Latest monitoring year
2025
Mid Kerry : Gearha (H) 300A

5.00% geographic overlap with the Killarney Built Up Area.

Technical mapping details
EDEN code
1300PUB1063
Local authority
Kerry
Page totals
Included
Spatial rank
2
Historical EPA scheme
Available
Latest monitoring year
2025

Detailed data

The complete parameter and listed exceedance tables for the reporting year.

68 parameter rows9 listed exceedance records125 samples
Show detailed data68 parameters · 9 exceedance records

Complete parameter index

All parameters in 2025

All parameters with test results or listed exceedance records in the latest reporting year
1,2-dichloroethane14013 Oct 20252
2,3,6-trichlorobenzoic acid14013 Oct 20252
2,4-D14013 Oct 20252
Acrylamide14013 Oct 20252
Aluminium120008 Dec 20252
Ammonium14013 Oct 20252
Antimony10015 Sep 20252
Arsenic14013 Oct 20252
Atrazine14013 Oct 20252
Bentazone14013 Oct 20252
Benzene14013 Oct 20252
Benzo(a)pyrene14013 Oct 20252
Bisphenol A14013 Oct 20252
Boron14013 Oct 20252
Bromate14013 Oct 20252
Cadmium14013 Oct 20252
Chlorfenvinphos14013 Oct 20252
Chloride14013 Oct 20252
Chromium14013 Oct 20252
Clopyralid14013 Oct 20252
Clostridium Perfringens14013 Oct 20252
Coliform Bacteria124108 Dec 20252
Colony Count @ 22°C109208 Dec 20252
Colour124008 Dec 20252
Conductivity124008 Dec 20252
Copper14013 Oct 20252
Cyanide14013 Oct 20252
Cypermethrin14013 Oct 20252
Dichlobenil14013 Oct 20252
Dichlorprop14013 Oct 20252
Diflufenican14013 Oct 20252
Diuron14013 Oct 20252
E. coli124008 Dec 20252
Enterococci124008 Dec 20252
Fluoride14013 Oct 20252
Free Chlorine124008 Dec 20252
Glyphosate14113 Oct 20252
Haloacetic acids (Sum of 5 HAAs)14013 Oct 20252
Iron123208 Dec 20252
Isoproturon14013 Oct 20252
Lead14013 Oct 20252
Linuron14013 Oct 20252
Manganese20013 Oct 20252
MCPA14013 Oct 20252
Mecoprop14013 Oct 20252
Mercury14013 Oct 20252
Metaldehyde14013 Oct 20252
Nickel14013 Oct 20252
Nitrate14013 Oct 20252
Nitrite (at tap)14013 Oct 20252
Odour124008 Dec 20252
PAH14013 Oct 20252
Pendimethalin14013 Oct 20252
Pesticides - Total14113 Oct 20252
pH124208 Dec 20252
Propyzamide14013 Oct 20252
Selenium14013 Oct 20252
Simazine14013 Oct 20252
Sodium16013 Oct 20252
Sulphate14013 Oct 20252
Sum of PFAS (sum of 20)14013 Oct 20252
Taste124008 Dec 20252
Tetrachloroethene & Trichloroethene14013 Oct 20252
Total Chlorine124008 Dec 20252
Total Organic Carbon14013 Oct 20252
Triclopyr14013 Oct 20252
Trihalomethanes(Total)14013 Oct 20252
Turbidity (at tap)124008 Dec 20252

Showing 68 of 68 parameters.

EPA exceedance dataset

Listed exceedances in 2025

Newest first. Sample IDs distinguish records that may otherwise look identical.

All listed exceedance records in the latest reporting year
DateParameterResultUnitReported limitWater supply / EDENSample ID
08 Dec 2025Colony Count @ 22°C3001ml100Central Regional - Lough Guitane (H) 400F
1300PUB1016		283893
12 Nov 2025Iron232ug/l200Central Regional - Lough Guitane (H) 400F
1300PUB1016		281251
06 Oct 2025Coliform Bacteria2100ml0Central Regional - Lough Guitane (H) 400F
1300PUB1016		278400
30 Jun 2025Iron277ug/l200Central Regional - Lough Guitane (H) 400F
1300PUB1016		271568
16 Jun 2025pH9.8pH Units9.5Central Regional - Lough Guitane (H) 400F
1300PUB1016		270569
14 Apr 2025pH9.8pH Units9.5Central Regional - Lough Guitane (H) 400F
1300PUB1016		267061
07 Apr 2025Glyphosate5.78µg/l0.1Mid Kerry : Gearha (H) 300A
1300PUB1063		266616
07 Apr 2025Pesticides - Total5.78ug/l0.5Mid Kerry : Gearha (H) 300A
1300PUB1063		266616
20 Jan 2025Colony Count @ 22°C1851ml100Mid Kerry : Gearha (H) 300A
1300PUB1063		262711

Common questions

Frequently asked questions

Is Killarney tap water safe to drink?

WaterCheck Ireland does not issue a current safe or unsafe verdict. This page presents historical monitoring data. Check Uisce Éireann for any current Boil Water or Do Not Consume notices affecting your address.

Can you drink tap water in Killarney?

WaterCheck Ireland provides historical drinking-water monitoring data, not a current safe or unsafe verdict. For current Boil Water or Do Not Consume notices, check your Eircode with Uisce Éireann.

What is the tap water quality in Killarney?

In 2025, monitoring data for 2 Water Supply Zones mapped to Killarney included 2,476 results across 68 parameters. The separate EPA-listed exceedance dataset contains 9 records for those zones in 2025. These figures summarise historical records and are not a current safety verdict.

Who monitors drinking water quality in Killarney?

The historical monitoring figures shown here come from drinking-water datasets published by the Environmental Protection Agency (EPA), Ireland. Uisce Éireann operates public water supplies and publishes current supply notices.

What is a Water Supply Zone?

A Water Supply Zone is a defined area supplied by a public drinking-water system. Monitoring records apply to the zone as a whole, so sampling locations can be outside the Census Built Up Area.

What does a listed exceedance mean?

It is a record published in the separate EPA exceedance dataset. WaterCheck Ireland reproduces those records and does not infer additional exceedances or turn the record count into a safety assessment.

How can I check current water notices for my Eircode?

Use your Eircode on the Uisce Éireann website to check current Boil Water and Do Not Consume notices. This page is based on historical monitoring data and is not a live notice service.

Explore nearby reports

Water Quality Near Killarney

Nearest published Built Up Areas, ordered by straight-line distance between Census reference points.

TraleeKerry · approximately 27.3 kmNewcastle WestLimerick · approximately 53.1 kmMallowCork · approximately 59.2 kmBandonCork · approximately 62.7 kmClonakiltyCork · approximately 63.9 kmCorkCork · approximately 73.9 km

Connected by mapped supply

Places sharing this Water Supply Zone

These published places share at least one Water Supply Zone used in this page's headline figures.

TraleeCentral Regional: Lough Guitane (H) 400F

How this page is made

Sources and methodology

Settlement
Census 2022 Built Up Area: Killarney. Population refers to the whole Built Up Area.
Supply mapping
Uisce Éireann Water Supply Zone boundaries are matched geographically to the settlement.
Monitoring
EPA monitoring results and the separate listed exceedance dataset, 2021–2025.
Interpretation
Geographic overlap measures land area, not population served; monitoring applies across the full supply zone.

Read the full methodologyView data sources