WaterCheck Ireland

Waterford Tap Water Quality

EPA monitoring records for Water Supply Zones mapped to Waterford contain 2,211 monitoring results across 71 parameters in 2025.

The separate EPA exceedance dataset contains 13 listed exceedance records across 6 parameters.

The most frequently listed were Aluminium (5), pH (3) and Colony Count @ 22°C (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
2,211Monitoring results
71Parameters tested
13EPA-listed exceedances
136Samples

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

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 median1
2025 maximum1
Measurements in 20259

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

5 numeric measurements available; 38 text-only records retained in JSON.

Nitrate

2025 median11.23
2025 maximum17.95
Measurements in 20259

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

44 numeric measurements available; 0 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

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

Coliform Bacteria

2025 median0 100ml
2025 maximum4 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

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

Fluoride

2025 median0.8
2025 maximum0.8
Measurements in 20259

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

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

Iron

2025 median20 ug/l
2025 maximum233 ug/l
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

135 numeric measurements available; 394 text-only records retained in JSON.

Arsenic

2025 median—
2025 maximum—
Measurements in 20259

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; 44 text-only records retained in JSON.

20252,211 results · 13 listed exceedances
Total results — independent scale
0 1,105.5 2,211 1,514 2021 1,788 2022 1,964 2023 2,021 2024 2,211 2025
Listed exceedances per 1,000 results — independent scale
0.000 2.940 5.880 1.321 2021 5.034 2022 2.037 2023 0.990 2024 5.880 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
20211,514966621.321
20221,7881316695.034
20231,9641326742.037
20242,0211266820.990
20252,21113671135.880

Year-to-year detail

2025 compared with 2024

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

Results
20242,021
20252,211
+190
Listed exceedances
20242
202513
+11
Samples
2024126
2025136
+10
Parameters
202468
202571
+3

Parameters with EPA-listed exceedances

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

Aluminium

5 listed exceedance records / 109 tests4.59%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
946 ug/l
Reported limit
200 ug/l
Records with this unit/limit pair
5
Latest exceedance
25 Jul 2025

pH

3 listed exceedance records / 124 tests2.42%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
6.32 pH Units
Reported limit
9.5 pH Units
Records with this unit/limit pair
3
Latest exceedance
23 Jul 2025

Colony Count @ 22°C

2 listed exceedance records / 115 tests1.74%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
163 1ml
Reported limit
100 1ml
Records with this unit/limit pair
2
Latest exceedance
06 Jan 2025

Coliform Bacteria

1 listed exceedance records / 124 tests0.81%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
4 100ml
Reported limit
0 100ml
Records with this unit/limit pair
1
Latest exceedance
25 Jul 2025

Colour

1 listed exceedance records / 124 tests0.81%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
31 Hazen
Reported limit
20 Hazen
Records with this unit/limit pair
1
Latest exceedance
07 Aug 2025

Iron

1 listed exceedance records / 124 tests0.81%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
233 ug/l
Reported limit
200 ug/l
Records with this unit/limit pair
1
Latest exceedance
07 Aug 2025

Across the year

When were listed exceedances recorded?

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

Colour07 Aug 2025
31 HazenReported result
20 HazenReported limit
East Waterford Water Supply SchemeWater supply
JanFebMarAprMayJunJulAugSepOctNovDecAluminiumColiform BacteriaColony Count @ 22°CColourIronpH07 Aug 2025 — Colour: 31 Hazen; reported limit 20; East Waterford Water Supply Scheme; sample 4620/2508616/0107 Aug 2025 — Iron: 233 ug/l; reported limit 200; East Waterford Water Supply Scheme; sample 4620/2508616/0125 Jul 2025 — Aluminium: 226 ug/l; reported limit 200; East Waterford Water Supply Scheme; sample 4620/2507604/0225 Jul 2025 — Coliform Bacteria: 4 100ml; reported limit 0; East Waterford Water Supply Scheme; sample 4620/2507604/0123 Jul 2025 — Aluminium: 356 ug/l; reported limit 200; East Waterford Water Supply Scheme; sample 4620/2507601/0423 Jul 2025 — pH: 6.32 pH Units; reported limit 9.5; East Waterford Water Supply Scheme; sample 4620/2507601/0323 Jul 2025 — pH: 6.13 pH Units; reported limit 9.5; East Waterford Water Supply Scheme; sample 4620/2507601/0422 Jul 2025 — Aluminium: 946 ug/l; reported limit 200; East Waterford Water Supply Scheme; sample 4620/2507598/0122 Jul 2025 — Aluminium: 646 ug/l; reported limit 200; East Waterford Water Supply Scheme; sample 4620/2507598/0222 Jul 2025 — pH: 5.86 pH Units; reported limit 9.5; East Waterford Water Supply Scheme; sample 4620/2507598/0101 Apr 2025 — Aluminium: 257 ug/l; reported limit 200; East Waterford Water Supply Scheme; sample 4620/2504500/0106 Jan 2025 — Colony Count @ 22°C: 131 1ml; reported limit 100; East Waterford Water Supply Scheme; sample 4620/2501444/0106 Jan 2025 — Colony Count @ 22°C: 163 1ml; reported limit 100; East Waterford Water Supply Scheme; sample 4620/2501445/01

13 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.

East Waterford Water Supply Scheme

50.28% geographic overlap with the Waterford Built Up Area.

Technical mapping details
EDEN code
3800PUB1110
Local authority
Waterford
Page totals
Included
Spatial rank
1
Historical EPA scheme
Available
Latest monitoring year
2025
South Kilkenny Environs

9.46% geographic overlap with the Waterford Built Up Area.

Technical mapping details
EDEN code
1500PUB1020
Local authority
Kilkenny
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 rows13 listed exceedance records136 samples
Show detailed data71 parameters · 13 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-dichloroethane9002 Oct 20252
2,3,6-trichlorobenzoic acid9002 Oct 20252
2,4-D9002 Oct 20252
Acrylamide9002 Oct 20252
Aluminium109515 Dec 20252
Ammonium9002 Oct 20252
Antimony9002 Oct 20252
Arsenic9002 Oct 20252
Atrazine9002 Oct 20252
Bentazone9002 Oct 20252
Benzene9002 Oct 20252
Benzo(a)pyrene9002 Oct 20252
Bisphenol A9002 Oct 20252
Boron9002 Oct 20252
Bromate9002 Oct 20252
Cadmium9002 Oct 20252
Chlorfenvinphos9002 Oct 20252
Chloride9002 Oct 20252
Chromium9002 Oct 20252
Clopyralid9002 Oct 20252
Clostridium Perfringens9002 Oct 20252
Coliform Bacteria124115 Dec 20252
Colony Count @ 22°C115215 Dec 20252
Colour124115 Dec 20252
Conductivity124015 Dec 20252
Copper9002 Oct 20252
Cryptosporidium12009 Dec 20251
Cyanide9002 Oct 20252
Cypermethrin9002 Oct 20252
Dichlobenil9002 Oct 20252
Dichlorprop9002 Oct 20252
Diflufenican9002 Oct 20252
Diuron9002 Oct 20252
E. coli124015 Dec 20252
Enterococci124015 Dec 20252
Fluoride9002 Oct 20252
Free Chlorine124015 Dec 20252
Giardia12009 Dec 20251
Glyphosate9002 Oct 20252
Haloacetic acids (Sum of 5 HAAs)9002 Oct 20252
Iron124115 Dec 20252
Isoproturon9002 Oct 20252
Lead9002 Oct 20252
Linuron9002 Oct 20252
Manganese9002 Oct 20252
MCPA9002 Oct 20252
Mecoprop9002 Oct 20252
Mercury9002 Oct 20252
Metaldehyde9002 Oct 20252
Microcystin-LR7002 Oct 20251
Nickel9002 Oct 20252
Nitrate9002 Oct 20252
Nitrite (at tap)9002 Oct 20252
Odour115015 Dec 20252
PAH9002 Oct 20252
Pendimethalin9002 Oct 20252
Pesticides - Total9002 Oct 20252
pH124315 Dec 20252
Propyzamide9002 Oct 20252
Selenium9002 Oct 20252
Simazine9002 Oct 20252
Sodium9002 Oct 20252
Sulphate9002 Oct 20252
Sum of PFAS (sum of 20)9002 Oct 20252
Taste115015 Dec 20252
Tetrachloroethene & Trichloroethene9002 Oct 20252
Total Chlorine124015 Dec 20252
Total Organic Carbon9002 Oct 20252
Triclopyr9002 Oct 20252
Trihalomethanes(Total)9002 Oct 20252
Turbidity (at tap)124015 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
07 Aug 2025Colour31Hazen20East Waterford Water Supply Scheme
3800PUB1110		4620/2508616/01
07 Aug 2025Iron233ug/l200East Waterford Water Supply Scheme
3800PUB1110		4620/2508616/01
25 Jul 2025Aluminium226ug/l200East Waterford Water Supply Scheme
3800PUB1110		4620/2507604/02
25 Jul 2025Coliform Bacteria4100ml0East Waterford Water Supply Scheme
3800PUB1110		4620/2507604/01
23 Jul 2025Aluminium356ug/l200East Waterford Water Supply Scheme
3800PUB1110		4620/2507601/04
23 Jul 2025pH6.32pH Units9.5East Waterford Water Supply Scheme
3800PUB1110		4620/2507601/03
23 Jul 2025pH6.13pH Units9.5East Waterford Water Supply Scheme
3800PUB1110		4620/2507601/04
22 Jul 2025Aluminium946ug/l200East Waterford Water Supply Scheme
3800PUB1110		4620/2507598/01
22 Jul 2025Aluminium646ug/l200East Waterford Water Supply Scheme
3800PUB1110		4620/2507598/02
22 Jul 2025pH5.86pH Units9.5East Waterford Water Supply Scheme
3800PUB1110		4620/2507598/01
01 Apr 2025Aluminium257ug/l200East Waterford Water Supply Scheme
3800PUB1110		4620/2504500/01
06 Jan 2025Colony Count @ 22°C1311ml100East Waterford Water Supply Scheme
3800PUB1110		4620/2501444/01
06 Jan 2025Colony Count @ 22°C1631ml100East Waterford Water Supply Scheme
3800PUB1110		4620/2501445/01

Common questions

Frequently asked questions

Is Waterford 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 Waterford?

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 Waterford?

In 2025, monitoring data for 2 Water Supply Zones mapped to Waterford included 2,211 results across 71 parameters. The separate EPA-listed exceedance dataset contains 13 records for those zones in 2025. These figures summarise historical records and are not a current safety verdict.

Who monitors drinking water quality in Waterford?

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 Waterford

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

TramoreWaterford · approximately 10.2 kmNew RossWexford · approximately 19.7 kmCarrick-on-SuirTipperary · approximately 22.5 kmDungarvanWaterford · approximately 38.8 kmClonmelTipperary · approximately 41.5 kmWexfordWexford · approximately 44.3 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.

TramoreEast Waterford Water Supply Scheme

How this page is made

Sources and methodology

Settlement
Census 2022 Built Up Area: Waterford city and suburbs. 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

Additional spatial intersections (1)

Retained for mapping transparency; excluded from primary monitoring totals.

ZoneEDENClassGeographic overlap
Mooncoin Regional WS1500PUB1012SECONDARY0.218349%