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Groundwater Regulations (Northern Ireland) 2009
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- Northern Ireland Statutory Rules
- 2009 No. 254
- SCHEDULE 1
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Changes and effects yet to be applied to Schedule:
- Regulations power to amend or modify conferred by 2021 c. 30 s. 89
- Regulations power to amend or modify conferred by 2021 c. 30 s. 91
Changes and effects yet to be applied to the whole Rule associated Parts and Chapters:
Whole provisions yet to be inserted into this Rule (including any effects on those provisions):
- Sch. inserted by S.R. 2014/208 reg. 12
- Sch. Table 1 substituted by S.R. 2016/119 reg. 5
- Sch. 1 Sch. renumbered as Sch. 1 by S.I. 2019/112 reg. 7(9)
- Sch. 2 inserted by S.I. 2019/112 reg. 7(10)
- reg. 2(5) inserted by S.I. 2019/112 reg. 7(3)
- reg. 8(6)(7) inserted by S.R. 2014/208 reg. 6(3)
- reg. 9(3) word substituted by S.R. 2017/81 Sch. 4 para. 4(3)
- reg. 10(6A) inserted by S.R. 2014/208 reg. 8(3)
- reg. 14(2) substituted by S.R. 2017/81 Sch. 4 para. 4(8)
- reg. 15(2) substituted by S.R. 2017/81 Sch. 4 para. 4(9)
- reg. 16(i) inserted by S.R. 2011/211 reg. 2(2)
- reg. 16(i) substituted by S.I. 2019/112 reg. 7(8)(b)
Regulation 8
[F1[F2SCHEDULE 1] N.I.Groundwater Threshold Values
This schedule has no associated Explanatory Memorandum
Textual Amendments
F1Sch. inserted (31.7.2014) by The Groundwater (Amendment) Regulations (Northern Ireland) 2014 (S.R. 2014/208), regs. 1, 12
F2Sch. renumbered as Sch. 1 (31.12.2020) by The Water (Amendment) (Northern Ireland) (EU Exit) Regulations 2019 (S.I. 2019/112), regs. 1(1), 7(9); 2020 c. 1, Sch. 5 para. 1(1)
[F3Table 1
Threshold values for assessing groundwater chemical status
| Parameter | Unit | To examine if groundwater abstraction is causing saline or other intrusions | To examine if groundwater is providing a significant contribution to the failure of the environmental objectives of associated surface water bodies | To examine if the quality of groundwater that is abstracted for potable use is deteriorating, possibly resulting in a need for increased purification | To examine the spatial extent of a groundwater body or group of bodies that are exceeding an EU Standard or threshold value |
|---|---|---|---|---|---|
(1) The surface water environmental standards are set out in Schedule 1 to The Water Framework Directive (Classification, Priority Substances and Shellfish Waters) Regulations (Northern Ireland) 2015(S.R. 2015 No. 351). | |||||
(2) The “dilution factor” is taken to be the fraction of the average annual river flow derived from groundwater inflows. It can be estimated from established hydrological indices such as the baseflow index, or from the ratio of catchment groundwater recharge to effective precipitation.] | |||||
| Ammonium | mg/l | 0.29 | |||
| Arsenic | μg/l | 7.5 | |||
| Atrazine | μg/l | 0.075 | |||
| Cadmium | μg/l | 3.75 | |||
| Chloride | mg/l | 25 | |||
| Electrical Conductivity | μS/cm | 800 | 1875 | ||
| Lead | μg/l | 7.5 | |||
| MCPA | μg/l | 0.075 | |||
| Mecoprop | μg/l | 0.075 | |||
| Mercury | μg/l | 0.75 | |||
| Nitrate (as NO3) | mg/l | 37.5 | 37.5 | ||
| Nitrite | μg/l | 375 | 375 | ||
| Simazine | μg/l | 0.075 | |||
| Sulphate | mg/l | 187.5 | |||
| Tetrachloroethylene | μg/l | 7.5 | 7.5 | ||
| Trichloroethylene | μg/l | 7.5 | 7.5 | ||
| Any pollutant in relation to which a surface water environmental standard has been set(1) | 0.5 x (surface water standard divided by dilution factor)(2) | ||||
Textual Amendments
F3Sch. Table 1 substituted (20.6.2016) by The Groundwater (Amendment) Regulations (Northern Ireland) 2016 (S.R. 2016/119), regs. 1(1), 5
Table 2
Threshold values for assessing the risk to wetlands
| Column header | Annual mean nitrate concentration (mg/l NO3) | ||
|---|---|---|---|
| Altitude Above Ordnance Datum | |||
| Wetland type | up to 175 metres | more than 175 metres | any |
| Quaking bog | 18 | 4 | |
| Wet dune | 13 | ||
| Fen (mesotrophic) and Fen Meadow | 22 | 9 | |
| Fen (oligotrophic and wetlands at tufa forming springs) | 20 | 4 | |
| Wet grassland | 26 | 9 | |
| Wet heath | 13 | 9 | |
| Peatbog and woodland on peatbog | 9 | ||
| Wetland directly irrigated by spring or seepage | 9 | ||
| Swamp (mesotrophic) and reedbed | 22 | ||
| Swamp (oligotrophic) | 18 | ||
| Wet woodland | 22 | 9] | |
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