WaterCheck Ireland

Carrigaline Tap Water Quality

EPA monitoring records for Water Supply Zones mapped to Carrigaline contain 3,841 monitoring results across 71 parameters in 2025.

The separate EPA exceedance dataset contains 12 listed exceedance records across 7 parameters.

The most frequently listed were Colony Count @ 22°C (3), Colour (3) and Coliform Bacteria (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
3,841Monitoring results
71Parameters tested
12EPA-listed exceedances
225Samples

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

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 median4 ug/l
2025 maximum7 ug/l
Measurements in 202516

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.

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Numeric resultEPA-listed exceedance

9 numeric measurements available; 52 text-only records retained in JSON.

Nitrate

2025 median7.66
2025 maximum34.71
Measurements in 202516

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.

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Numeric resultEPA-listed exceedance

41 numeric measurements available; 20 text-only records retained in JSON.

E. coli

2025 median0
2025 maximum0
Measurements in 2025204

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

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

Coliform Bacteria

2025 median0 100ml
2025 maximum5 100ml
Measurements in 2025204

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

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

Fluoride

2025 median0.7 mg/l
2025 maximum0.9 mg/l
Measurements in 202516

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

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

Iron

2025 median42 ug/l
2025 maximum223 ug/l
Measurements in 2025205

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

119 numeric measurements available; 587 text-only records retained in JSON.

Arsenic

2025 median—
2025 maximum—
Measurements in 202516

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; 61 text-only records retained in JSON.

20253,841 results · 12 listed exceedances
Total results — independent scale
0 1,920.5 3,841 2,211 2021 2,232 2022 2,373 2023 2,352 2024 3,841 2025
Listed exceedances per 1,000 results — independent scale
0.000 2.488 4.975 4.975 2021 4.032 2022 2.107 2023 1.701 2024 3.124 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
20212,21115066114.975
20222,2321486694.032
20232,3731616752.107
20242,3521446741.701
20253,84122571123.124

Year-to-year detail

2025 compared with 2024

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

Results
20242,352
20253,841
+1,489
Listed exceedances
20244
202512
+8
Samples
2024144
2025225
+81
Parameters
202467
202571
+4

Parameters with EPA-listed exceedances

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

Colony Count @ 22°C

3 listed exceedance records / 188 tests1.60%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
300 1ml
Reported limit
100 1ml
Records with this unit/limit pair
3
Latest exceedance
19 Nov 2025

Colour

3 listed exceedance records / 204 tests1.47%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
28 Hazen
Reported limit
20 Hazen
Records with this unit/limit pair
3
Latest exceedance
22 Sep 2025

Coliform Bacteria

2 listed exceedance records / 204 tests0.98%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
5 100ml
Reported limit
0 100ml
Records with this unit/limit pair
2
Latest exceedance
19 Aug 2025

Bisphenol A

1 listed exceedance records / 16 tests6.25%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
9.23 µg/l
Reported limit
2.5 µg/l
Records with this unit/limit pair
1
Latest exceedance
15 Jul 2025

Iron

1 listed exceedance records / 205 tests0.49%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
223 ug/l
Reported limit
200 ug/l
Records with this unit/limit pair
1
Latest exceedance
06 May 2025

Manganese

1 listed exceedance records / 57 tests1.75%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
53 ug/l
Reported limit
50 ug/l
Records with this unit/limit pair
1
Latest exceedance
06 May 2025

Trihalomethanes(Total)

1 listed exceedance records / 16 tests6.25%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
144 ug/l
Reported limit
100 ug/l
Records with this unit/limit pair
1
Latest exceedance
19 Aug 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°C19 Nov 2025
190 1mlReported result
100 1mlReported limit
Cork Harbour & CityWater supply
JanFebMarAprMayJunJulAugSepOctNovDecBisphenol AColiform BacteriaColony Count @ 22°CColourIronManganeseTrihalomethanes(Total)19 Nov 2025 — Colony Count @ 22°C: 190 1ml; reported limit 100; Cork Harbour & City; sample 2025/210222 Sep 2025 — Colour: 25 Hazen; reported limit 20; Cork Harbour & City; sample 2025/140404 Sep 2025 — Colony Count @ 22°C: 300 1ml; reported limit 100; Cork Harbour & City; sample 19723019 Aug 2025 — Coliform Bacteria: 2 100ml; reported limit 0; Cork Harbour & City; sample 2025/118619 Aug 2025 — Colour: 24 Hazen; reported limit 20; Cork Harbour & City; sample 19437219 Aug 2025 — Trihalomethanes(Total): 144 ug/l; reported limit 100; Cork Harbour & City; sample 2025/119515 Jul 2025 — Bisphenol A: 9.23 µg/l; reported limit 2.5; Cork Harbour & City; sample 2025/117606 May 2025 — Iron: 223 ug/l; reported limit 200; Cork Harbour & City; sample 17529306 May 2025 — Manganese: 53 ug/l; reported limit 50; Cork Harbour & City; sample 17529319 Mar 2025 — Coliform Bacteria: 5 100ml; reported limit 0; Cork Harbour & City; sample 2025/045919 Mar 2025 — Colony Count @ 22°C: 151 1ml; reported limit 100; Cork Harbour & City; sample 2025/045921 Jan 2025 — Colour: 28 Hazen; reported limit 20; Cork Harbour & City; sample 2025010

12 listed exceedance records across 7 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.

Cork Harbour and City

50.88% geographic overlap with the Carrigaline Built Up Area.

Technical mapping details
EDEN code
0500PUB3401
Local authority
Cork
Page totals
Included
Spatial rank
1
Historical EPA scheme
Available
Latest monitoring year
2025
Innishannon

40.82% geographic overlap with the Carrigaline Built Up Area.

Technical mapping details
EDEN code
0500PUB3501
Local authority
Cork
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.

71 parameter rows12 listed exceedance records225 samples
Show detailed data71 parameters · 12 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-dichloroethane16016 Dec 20252
2,3,6-trichlorobenzoic acid16016 Dec 20252
2,4-D16016 Dec 20252
Acrylamide16016 Dec 20252
Aluminium204016 Dec 20252
Ammonium16016 Dec 20252
Antimony16016 Dec 20252
Arsenic16016 Dec 20252
Atrazine16016 Dec 20252
Bentazone16016 Dec 20252
Benzene16016 Dec 20252
Benzo(a)pyrene16016 Dec 20252
Bisphenol A16116 Dec 20252
Boron16016 Dec 20252
Bromate16016 Dec 20252
Cadmium16016 Dec 20252
Chlorfenvinphos16016 Dec 20252
Chloride31016 Dec 20252
Chromium16016 Dec 20252
Clopyralid16016 Dec 20252
Clostridium Perfringens16016 Dec 20252
Coliform Bacteria204216 Dec 20252
Colony Count @ 22°C188316 Dec 20252
Colour204316 Dec 20252
Conductivity204016 Dec 20252
Copper16016 Dec 20252
Cryptosporidium14016 Dec 20252
Cyanide16016 Dec 20252
Cypermethrin16016 Dec 20252
Dichlobenil16016 Dec 20252
Dichlorprop16016 Dec 20252
Diflufenican16016 Dec 20252
Diuron16016 Dec 20252
E. coli204016 Dec 20252
Enterococci204016 Dec 20252
Fluoride16016 Dec 20252
Free Chlorine211016 Dec 20252
Giardia14016 Dec 20252
Glyphosate16016 Dec 20252
Haloacetic acids (Sum of 5 HAAs)16016 Dec 20252
Iron205116 Dec 20252
Isoproturon16016 Dec 20252
Lead16016 Dec 20252
Linuron16016 Dec 20252
Manganese57116 Dec 20252
MCPA16016 Dec 20252
Mecoprop16016 Dec 20252
Mercury16016 Dec 20252
Metaldehyde16016 Dec 20252
Microcystin-LR10023 Sep 20251
Nickel16016 Dec 20252
Nitrate16016 Dec 20252
Nitrite (at tap)16016 Dec 20252
Odour210016 Dec 20252
PAH16016 Dec 20252
Pendimethalin16016 Dec 20252
Pesticides - Total16016 Dec 20252
pH204016 Dec 20252
Propyzamide16016 Dec 20252
Selenium16016 Dec 20252
Simazine16016 Dec 20252
Sodium16016 Dec 20252
Sulphate29016 Dec 20252
Sum of PFAS (sum of 20)16016 Dec 20252
Taste210016 Dec 20252
Tetrachloroethene & Trichloroethene16016 Dec 20252
Total Chlorine211016 Dec 20252
Total Organic Carbon19016 Dec 20252
Triclopyr16016 Dec 20252
Trihalomethanes(Total)16116 Dec 20252
Turbidity (at tap)204016 Dec 20252

Showing 71 of 71 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
19 Nov 2025Colony Count @ 22°C1901ml100Cork Harbour & City
0500PUB3401		2025/2102
22 Sep 2025Colour25Hazen20Cork Harbour & City
0500PUB3401		2025/1404
04 Sep 2025Colony Count @ 22°C3001ml100Cork Harbour & City
0500PUB3401		197230
19 Aug 2025Coliform Bacteria2100ml0Cork Harbour & City
0500PUB3401		2025/1186
19 Aug 2025Colour24Hazen20Cork Harbour & City
0500PUB3401		194372
19 Aug 2025Trihalomethanes(Total)144ug/l100Cork Harbour & City
0500PUB3401		2025/1195
15 Jul 2025Bisphenol A9.23µg/l2.5Cork Harbour & City
0500PUB3401		2025/1176
06 May 2025Iron223ug/l200Cork Harbour & City
0500PUB3401		175293
06 May 2025Manganese53ug/l50Cork Harbour & City
0500PUB3401		175293
19 Mar 2025Coliform Bacteria5100ml0Cork Harbour & City
0500PUB3401		2025/0459
19 Mar 2025Colony Count @ 22°C1511ml100Cork Harbour & City
0500PUB3401		2025/0459
21 Jan 2025Colour28Hazen20Cork Harbour & City
0500PUB3401		2025010

Common questions

Frequently asked questions

Is Carrigaline 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 Carrigaline?

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 Carrigaline?

In 2025, monitoring data for 2 Water Supply Zones mapped to Carrigaline included 3,841 results across 71 parameters. The separate EPA-listed exceedance dataset contains 12 records for those zones in 2025. These figures summarise historical records and are not a current safety verdict.

Who monitors drinking water quality in Carrigaline?

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 Carrigaline

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

Passage West and MonkstownCork · approximately 6.2 kmCobhCork · approximately 7.6 kmCorkCork · approximately 10.0 kmCarrigtwohillCork · approximately 13.7 kmKinsaleCork · approximately 15.1 kmMidletonCork · approximately 18.5 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.

Passage West and MonkstownCork Harbour and CityCorkCork Harbour and CityKinsaleInnishannon

How this page is made

Sources and methodology

Settlement
Census 2022 Built Up Area: Carrigaline. 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