WaterCheck Ireland

Ballybofey and Stranorlar Tap Water Quality

EPA monitoring records for Water Supply Zones mapped to Ballybofey and Stranorlar contain 737 monitoring results across 69 parameters in 2025.

The separate EPA exceedance dataset contains 2 listed exceedance records across 2 parameters.

The most frequently listed were Haloacetic acids (Sum of 5 HAAs) (1) and Iron (1).

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 Zone
Lough Mourne
Geographic overlap
92.16%
737Monitoring results
69Parameters tested
2EPA-listed exceedances
38Samples

The Ballybofey and Stranorlar Built Up Area overlaps Lough Mourne across approximately 92.16% of its land area.

Monitoring results apply to the Water Supply Zone as a whole and may include sampling locations outside Ballybofey and Stranorlar.

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 20254

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

0 numeric measurements available; 18 text-only records retained in JSON.

Nitrate

2025 median—
2025 maximum—
Measurements in 20254

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

0 numeric measurements available; 14 text-only records retained in JSON.

E. coli

2025 median0
2025 maximum0
Measurements in 202538

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

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

Coliform Bacteria

2025 median0
2025 maximum0
Measurements in 202538

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

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

Fluoride

2025 median—
2025 maximum—
Measurements in 20254

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

2 numeric measurements available; 16 text-only records retained in JSON.

Iron

2025 median96 ug/l
2025 maximum303 ug/l
Measurements in 202538

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.

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Numeric resultEPA-listed exceedance

90 numeric measurements available; 88 text-only records retained in JSON.

Arsenic

2025 median—
2025 maximum—
Measurements in 20254

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

3 numeric measurements available; 15 text-only records retained in JSON.

2025737 results · 2 listed exceedances
Total results — independent scale
0 368.5 737 628 2021 586 2022 606 2023 722 2024 737 2025
Listed exceedances per 1,000 results — independent scale
0.000 4.266 8.532 7.962 2021 8.532 2022 4.950 2023 0.000 2024 2.714 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
2021628366257.962
2022586346458.532
2023606336534.950
2024722386500.000
2025737386922.714

Year-to-year detail

2025 compared with 2024

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

Results
2024722
2025737
+15
Listed exceedances
20240
20252
+2
Samples
202438
202538
0
Parameters
202465
202569
+4

Parameters with EPA-listed exceedances

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

Haloacetic acids (Sum of 5 HAAs)

1 listed exceedance records / 4 tests25.00%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
71 µg/l
Reported limit
60 µg/l
Records with this unit/limit pair
1
Latest exceedance
15 Aug 2025

Iron

1 listed exceedance records / 38 tests2.63%

Descriptive frequency of records, not an official compliance measure.

Highest listed result
303 ug/l
Reported limit
200 ug/l
Records with this unit/limit pair
1
Latest exceedance
08 Apr 2025

Across the year

When were listed exceedances recorded?

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

Haloacetic acids (Sum of 5 HAAs)15 Aug 2025
71 µg/lReported result
60 µg/lReported limit
LOUGH MOURNEWater supply
JanFebMarAprMayJunJulAugSepOctNovDecHaloacetic acids (Sum of 5 HAAs)Iron15 Aug 2025 — Haloacetic acids (Sum of 5 HAAs): 71 µg/l; reported limit 60; LOUGH MOURNE; sample 19328908 Apr 2025 — Iron: 303 ug/l; reported limit 200; LOUGH MOURNE; sample 170790

2 listed exceedance records across 2 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.

Lough Mourne

92.16% geographic overlap with the Ballybofey and Stranorlar Built Up Area.

Technical mapping details
EDEN code
0600PUB1076
Local authority
Donegal
Page totals
Included
Spatial rank
1
Historical EPA scheme
Available
Latest monitoring year
2025

Detailed data

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

69 parameter rows2 listed exceedance records38 samples
Show detailed data69 parameters · 2 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-dichloroethane4014 Oct 20251
2,3,6-trichlorobenzoic acid4014 Oct 20251
2,4-D4014 Oct 20251
Acrylamide4014 Oct 20251
Aluminium36017 Dec 20251
Ammonium4014 Oct 20251
Antimony4014 Oct 20251
Arsenic4014 Oct 20251
Atrazine4014 Oct 20251
Bentazone4014 Oct 20251
Benzene4014 Oct 20251
Benzo(a)pyrene4014 Oct 20251
Bisphenol A4014 Oct 20251
Boron4014 Oct 20251
Bromate4014 Oct 20251
Cadmium4014 Oct 20251
Chlorfenvinphos4014 Oct 20251
Chloride4014 Oct 20251
Chromium4014 Oct 20251
Clopyralid4014 Oct 20251
Clostridium Perfringens4014 Oct 20251
Coliform Bacteria38017 Dec 20251
Colony Count @ 22°C34017 Dec 20251
Colour38017 Dec 20251
Conductivity38017 Dec 20251
Copper4014 Oct 20251
Cyanide4014 Oct 20251
Cypermethrin4014 Oct 20251
Dichlobenil4014 Oct 20251
Dichlorprop4014 Oct 20251
Diflufenican4014 Oct 20251
Diuron4014 Oct 20251
E. coli38017 Dec 20251
Enterococci38017 Dec 20251
Fluoride4014 Oct 20251
Free Chlorine38017 Dec 20251
Glyphosate4014 Oct 20251
Haloacetic acids (Sum of 5 HAAs)4114 Oct 20251
Iron38117 Dec 20251
Isoproturon4014 Oct 20251
Lead4014 Oct 20251
Linuron4014 Oct 20251
Manganese4014 Oct 20251
MCPA4014 Oct 20251
Mecoprop4014 Oct 20251
Mercury4014 Oct 20251
Metaldehyde4014 Oct 20251
Microcystin-LR3014 Oct 20251
Nickel4014 Oct 20251
Nitrate4014 Oct 20251
Nitrite (at tap)4014 Oct 20251
Odour34017 Dec 20251
PAH4014 Oct 20251
Pendimethalin4014 Oct 20251
Pesticides - Total4014 Oct 20251
pH38017 Dec 20251
Propyzamide4014 Oct 20251
Selenium4014 Oct 20251
Simazine4014 Oct 20251
Sodium4014 Oct 20251
Sulphate4014 Oct 20251
Sum of PFAS (sum of 20)4014 Oct 20251
Taste34017 Dec 20251
Tetrachloroethene & Trichloroethene4014 Oct 20251
Total Chlorine38017 Dec 20251
Total Organic Carbon4014 Oct 20251
Triclopyr4014 Oct 20251
Trihalomethanes(Total)4014 Oct 20251
Turbidity (at tap)38017 Dec 20251

Showing 69 of 69 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
15 Aug 2025Haloacetic acids (Sum of 5 HAAs)71µg/l60LOUGH MOURNE
0600PUB1076		193289
08 Apr 2025Iron303ug/l200LOUGH MOURNE
0600PUB1076		170790

Common questions

Frequently asked questions

Is Ballybofey and Stranorlar 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 Ballybofey and Stranorlar?

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 Ballybofey and Stranorlar?

In 2025, monitoring data for the Water Supply Zone mapped to Ballybofey and Stranorlar included 737 results across 69 parameters. The separate EPA-listed exceedance dataset contains 2 records for those zones in 2025. These figures summarise historical records and are not a current safety verdict.

Who monitors drinking water quality in Ballybofey and Stranorlar?

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 Ballybofey and Stranorlar

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

LetterkennyDonegal · approximately 18.4 kmBuncranaDonegal · approximately 42.8 kmSligoSligo · approximately 73.7 kmMonaghanMonaghan · approximately 81.0 kmCavanCavan · approximately 93.7 kmCarrickmacrossMonaghan · approximately 114.7 km

How this page is made

Sources and methodology

Settlement
Census 2022 Built Up Area: Ballybofey-Stranorlar. 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