South Dublin County Council

Drinking Water

Drinking Water Quality Monitoring Results:

Summary results of samples of drinking water taken throughout the network during 2011 can be found in the documents section below.

Samples of drinking water are taken throughout the network and analysed for over 50 parameters. Analysis is carried out on all samples taken in South Dublin at Dublin City Council's central laboratory. A description of the various parameters is given on Dublin City Council's Website - What are the drinking water quality standards

Results of sampling carried out in 2016 are as follows:

Results for January 2017
Total number of tests performed: 372
Total number of non-compliant results: 0
Overall percentage compliance: 100%

Results for December 2016
Total number of tests performed: 228
Total number of non-compliant results: 0
Overall percentage compliance: 100%

Results for November 2016
Total number of tests performed: 384
Total number of non-compliant results: 1
Overall percentage compliance: 99.8%

Details of non-compliant results in November 2016
02/11/2016 - sample taken at 40 Willbrook Park, Rathfarnham returned 661ug/l Iron*
*Re-samples on 15/11/2016 at 30 and 36 Willbrook Park were compliant. Access not possible at original address

Results for October 2016
Total number of tests performed: 264
Total number of non-compliant results: 0
Overall percentage compliance: 100%

Results for September 2016
Total number of tests performed: 324
Total number of non-compliant results: 0
Overall percentage compliance: 100%

Results for August 2016
Total number of tests performed: 252
Total number of non-compliant results: 1
Overall percentage compliance: 99.7%

Details of non-compliant results in August 2016
11/08/2016 - sample taken at 20 Monastery Gate Copse, Clondalkin returned 1 MPN Total Coliforms*.
*Follow up samples returned clear

Follow up samples:
Code Supply Location Sample Type Date Parameter Result Unit
Zone 2 Ballymore Eustace 2 Limekiln Road Walkinstown Recheck 02/09/2016 Iron 49 ug/l
Zone 2 Ballymore Eustace 12 Limekiln Road Walkinstown Recheck 02/09/2016 Iron 93 ug/l
Zone 2 Ballymore Eustace 40 Limekiln Road Walkinstown Recheck 02/09/2016 Iron 78 ug/l

Compliant follow-up samples relating to an Iron exceedance at Limekiln Road. 

Results for July 2016

Total number of tests performed: 312
Total number of non-compliant results: 0
Overall percentage compliance: 100%

Results for June 2016

Total number of tests performed: 310
Total number of non-compliant results: 2
Overall percentage compliance: 99.35%

Details of non-compliant results in June 2016
14/06/2016 - sample taken at Westbury Drive, Lucan, Co. Dublin, returned 1 MPN Total Coliforms*.
16/06/2016 – sample taken at Esso Parkway East N4, Palmerstown, Dublin 20, returned 248 µg/l Iron.
*Satisfactory results obtained on follow up samples.

Results for May 2016

Total number of tests performed: 312
Total number of non-compliant results: 1
Overall percentage compliance: 99.7%

Details of non-compliant results in May 2016
12/05/2016 – Sample taken at Butterfield Avenue returned 303 ug/l Iron

Results for April 2016

Total number of tests performed: 276
Total number of non-compliant results: 3
Overall percentage compliance: 98.9%

Details of non-compliant results in April 2016
13/04/2016 – Sample taken at 105 Whitecliff Estate, Rathfarnham returned 1 MPN Total Coliform*
20/04/2016 - Sample taken at 11 Beechfield Road, Walkinstown returned 5 MPN Total Coliform**
20/04/2016 – Sample taken at Keogh’s Cottages, Rathcoole returned 223 ug/l Iron***

*Follow-up samples taken at 103 and 112 Whitecliff Estate on 19.04.16. All samples clear.
**Follow-up samples taken at 11 and 12 Beechfield Road on 27.04.16. Samples after disinfection clear.
***Follow-up samples taken at original address and two neighbouring addresses on 06.05.16. samples were compliant

Results for March 2016
Total number of tests performed: 324
Total number of non-compliant results: 1
Overall percentage compliance: 99.7%
 
Details of non-compliant results in March 2016
30/03/2016 - sample taken at Friars Walk, Clondalkin returned 29 MPN Total Coliforms*.
*Satisfactory results obtained from resample taken on 05/04/2016

Results for February 2016

Total number of tests performed: 360
Total number of non-compliant results: 0
Overall percentage compliance: 100%

Results for January 2016

Total number of tests performed: 288
Total number of non-compliant results: 0
Overall percentage compliance: 100%

Water Hardness

Water Hardness enquiries usually relate to installation of new dishwashers and washing machines. The water in South Dublin County Council is mainly sourced from two water treatment plants at Ballymore-Eustace and Leixlip. The water from Leixlip would be considered hard water and from Ballymore-Eustace it is soft water. We don’t supply any water directly from Leixlip, but water from Leixlip is blended in our reservoir at Peamount which serves parts of Lucan and hence water in this area can be of medium hardness.

Typical values for total hardness as Calcium Carbonate are given below:

Ballymore-Eustace Water (supplies to over 90% of County)
mg/L CaCO3 = 50
eH (Clarke or English Degrees) = 3.5
dH (German Degrees) = 2.8
fH (French Degrees) = 5
Mmol CaCO3 = 0.5
American Hardness Degrees (ppm) = 50

Leixlip Water (blended supply to area in north of County, mainly in Lucan)
mg/L CaCO3 = 150 - 300
eH (Clarke or English Degrees) = 10.5 - 21.9
dH (German Degrees) = 8.4 - 16.8
fH (French Degrees) = 15 - 30
Mmol CaCO3 = 1.5 - 3.0
American Hardness Degrees (ppm) = 150 – 300

Contacts:
1. Emergencies: Manned switchboard: 08.00H to 24.00H. Ph (01) 4574907
2. Pageboy service: 0.00H to 08.00H. Ph (01) 4901884
3. Deansrath Maintenance Depot: Ph (01) 4138500
4. Water Services
South Dublin County Council,
County Hall,
Tallaght,
Dublin 24.
Phone (01) 414 9000

 

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