Phosphorus limits on environmental permits for waste water treatment work discharges

We are reviewing phosphorus limits on Environmental Permits for waste water treatment works discharges which exceed a dry weather flow of 20m³/day.

The list below are all the permits we intend to review before July 2024.

The table will be updated every Friday as more permits are released.

There is a two month appeal period from the date of issue. In the event of an appeal by a water company we will update the list below to identify which permits are affected. The permit for the appealed WwTW will revert to the previous version until the outcome of the appeal is decided.

Please see our public register for the full Environmental Permit once issued.

Several Waste Water Treatment Works no longer require a variation or phosphorus limits because they discharge under 20m3/day of treated sewage effluent. These permits are shown as 0mg/l (P limit) in the table below.

Existing permits for these sites are still available via our public register.

AC Catchment	WwTW Name	Permit Number	Issue date of reviewed permit	P limit (1) mg/l	Effective date P limit (1)	P limit (2) mg/l	Effective date P limit (2)	Same as permit? (Yes / No)	Comments
Cleddau	CLYNDERWEN	BG0029501	10/07/2023	1mg/l	10/07/2023	0.25mg/l	31/03/2030	Yes	N/A
Cleddau	LETTERSTON WEST	BH0071101	26/03/2024	5mg/l	04/04/2024	2.5mg/l	31/12/2025	Yes	N/A
Cleddau	WOLFSCASTLE	BH0068601	23/01/2024	5mg/l	30/01/2024	2.3mg/l	31/12/2025	No	P limit of 2.3 mg/l from 31/03/2030
Cleddau	TREFFGARNE	BN0071601	26/01/2024	5mg/l	02/02/2025	0	0	Yes	N/A
Cleddau	AMBLESTON	BG0001101	01/02/2024	5mg/l	08/02/2025	0	0	No	P limit of 5 mg/l from 28/01/2028
Cleddau	CAMROSE	BG0004901	06/12/2023	5mg/l	13/12/2023	4.5mg/l	31/03/2030	Yes	N/A
Cleddau	CLARBESTON	BG0014501	29/04/2024	5mg/l	07/05/2024	1.5mg/l	31/03/2030	Yes	N/A
Cleddau	KEESTON	BP0087901	19/01/2024	5mg/l	26/01/2024	1.5mg/l	31/03/2030	Yes	N/A
Cleddau	LLANDDEWI VELFREY	BG0013201	11/06/2024	5mg/l	18/06/2024	1mg/l	31/03/2032	Yes	N/A
Cleddau	MATHRY	BG0009701	27/06/2024	5mg/l	28/01/2028	1mg/l	31/03/2030	Yes	P limit of 5 mg/l from 28/01/2028
Cleddau	PUNCHESTON	BG0017601	13/12/2023	5mg/l	20/12/2023	0	0	Yes	N/A
Cleddau	MAENCLOCHOG	BG0000401	02/08/2023	2mg/l	02/08/2023	0	0	Yes	N/A
Cleddau	SPITTAL	BG0016901	03/06/2024	0.6mg/l	31/03/2025	0	0	Yes	N/A
Dee	CORWEN	CM0018301	11/12/2023	1mg/l	31/03/2025	0	0	Yes	N/A
Dee	CEFN MAWR	CM0101301	28/09/2023	1 mg/l	28/09/2023	0	0	Yes	N/A
Dee	GRESFORD	CM0040601	28/07/2023	2mg/l	28/07/2023	0	0	No	P limit of 1 mg/l from 28/07/2023
Dee	LLANGOLLEN	CM0005401	01/07/2020	1mg/l	01/07/2020	0	0	Yes	N/A
Dee	HOPE	CM0075801	28/09/2023	1 mg/l	28/09/2023	0	0	Yes	N/A
Dee	OVERTON	CM0188601	31/05/2024	5mg/l	26/01/2028	0	0	Yes	N/A
Dee	MAES Y GROES	CM0071201	05/03/2024	5mg/l	12/03/2024	0	0	Yes	N/A
Dee	FIVE FORDS	CM0077801	28/07/2023	1mg/l	28/07/2023	0.7mg/l	31/03/2030	Yes	N/A
Dee	CARROG	CM0000501	08/08/2024	5mg/l	28/01/2028	0	0	Yes	N/A
Dee	BRYNEGLWYS	CM0032401	04/03/2024	5mg/l	11/03/2024	0	0	Yes	N/A
Dee	CYNWYD	CM0149301	23/02/2023	5mg/l	01/03/2025	3.5mg/l	31/01/2030	No	P limit of 5 mg/l effective from 01/01/2025. 3.5 mg/l limit not currently in permit.
Dee	PENLEY	CM0118501	19/06/2024	5mg/l	26/06/2025	0.9mg/l	31/03/2030	Yes	N/A
Dee	GLYNDYFRDWY	CM0026801	27/06/2024	5mg/l	26/01/2027	0	0	Yes	N/A
Dee	LLANDRILLO	CM0006001	11/07/2024	5mg/l	28/01/2028	0	0	No	P limit of 5 mg/l from 28/01/2027
Dee	BETWS GWERFIL GOCH	CM0026601	17/01/2024	5mg/l	24/01/2024	0	0	Yes	N/A
Dee	FRONCYSYLLTE	CM0101501	02/05/2024	5mg/l	26/01/2028	0	0	Yes	N/A
Dee	GLYNCEIRIOG	CM0021801	03/05/2024	0.5mg/l	26/01/2028	0	0	Yes	N/A
Dee	BOWLING BANK	CM0149401	0	0	0	0	0	Yes	N/A
Dee	BRONINGTON	CM0072001	11/03/2024	5mg/l	18/03/2025	0	0	Yes	N/A
Dee	CERRIGYDRUDION	CM0052101	17/06/2024	5mg/l	24/06/2024	1mg/l	31/03/2030	Yes	N/A
Dee	CILCAIN PANTYMWYN	CM0024401	10/07/2024	5mg/l	28/01/2028	0	0	Yes	N/A
Dee	DINMAEL	CM0038801	0	0	0	0	0	Yes	N/A
Dee	DOLYWERN	CM0007901	10/07/2024	5mg/l	26/01/2028	2mg/l	31/03/2030	Yes	N/A
Dee	FRONGOCH	CM0077301	12/12/2023	5mg/l	19/12/2023	0	0	Yes	N/A
Dee	HALTON	CM0022001	18/12/2023	5mg/l	27/12/2023	0	0	Yes	N/A
Dee	LLANARMON	CM0022101	04/01/2024	5mg/l	11/01/2024	1.5mg/l	31/03/2032	No	P limit of 1.5 mg/l from 31/03/2030
Dee	LLANARMON-YN-IAL	CM0001201	23/01/2024	5mg/l	30/01/2025	0	0	No	P limit of 5 mg/l from 28/01/2028
Dee	LLIDIART ANNIE	CM0013201	0	0	0	0	0	Yes	N/A
Dee	PANDY	CM0022201	27/06/2024	5mg/l	26/01/2028	0	0	Yes	N/A
Dee	PEN-Y-STRYT	CM0043501	07/03/2024	5mg/l	14/03/2025	0	0	Yes	N/A
Dee	PONTFADOG	CM0021701	08/07/2024	5mg/l	28/01/2028	1mg/l	31/03/2030	Yes	N/A
Dee	RHOSESMOR	CM0044201	22/12/2023	5mg/l	04/01/2024	0	0	Yes	N/A
Dee	RHYDYMWYN	CM0004201	25/07/2025	5mg/l	25/07/2025	0	0	No	P limit of 5 mg/l from 28/01/2027
Dee	TREUDDYN	CM0066101	10/08/2023	5mg/l	10/08/2023	0	0	No	P limit of 5 mg/l from 14/02/2024
Dee	LLANDDERFEL	CM0045201	06/03/2024	5mg/l	13/03/2025	0	0	Yes	N/A
Dee	BALA	CM0001501	31/07/2023	5mg/l	31/07/2023	4mgl	31/03/2030	Yes	N/A
Dee	MOLD	CM0031001	09/08/2023	1mg/l	09/08/2023	0	0	Yes	N/A
Dee	BANGOR ON DEE	CM0060701	06/11/2023	5mg/l	13/11/2023	0	0	Yes	N/A
Dee	LAVISTER	CM0077501	21/09/2023	1mg/l	21/09/2023	0	0	Yes	N/A
Dee	TY GWYN BUCKLEY	CM0081001	10/08/2023	1mg/l	10/08/2023	0	0	Yes	N/A
Dee	HOLT	CM0102001	14/06/2024	5mg/l	28/01/2028	0	0	Yes	N/A
Eden	LLANFACHRETH	CG0110901	11/06/2024	5mg/l	18/06/2024	0	0	Yes	N/A
Eden	BRONABER	CG0086701	17/06/2024	5mg/l	24/06/2024	0.8mg/l	31/03/2030	Yes	N/A
Gwyrfi	RHYD DDU	CG0024101	12/01/2024	5mg/l	19/01/2024	0	0	Yes	N/A
Gwyrfi	WAUNFAWR	CG0134001	11/12/2023	5mg/l	18/12/2023	1.6mg/l	31/03/2030	Yes	N/A
Gwyrfi	LLANFAGLAN WWTW FINAL EFFLUENT	CG0078101	31/05/2024	1mg/l	07/06/2024	0.7mg/l	31/03/2032	Yes	N/A
Meir	BEDDGELERT	CG0024001	26/01/2024	5mg/l	02/02/2024	0	0	Yes	N/A
Meir	CROESOR - NEW WORKS	CG0133001	17/01/2024	5mg/l	24/01/2024	0	0	Yes	N/A
Meir	LLANFROTHEN	CG0078701	07/02/2024	5mg/l	14/02/2024	0	0	Yes	N/A
Meir	PRENTEG	CG0015001	19/07/2024	5mg/l	28/01/2027	0	0	Yes	N/A
Teifi	LAMPETER	BP0045001	05/12/2023	5mg/l	12/12/2023	0.5mg/l	31/12/2025	Yes	N/A
Teifi	ADPAR CEREDIGION	BN0112801	13/12/2023	5mg/l	20/12/2023	0	0	Yes	N/A
Teifi	CILGERRAN	BP0217801	15/12/2023	5mg/l	22/12/2023	0	0	Yes	N/A
Teifi	LLANYBYDDER CEREDIGION	BJ0091401	22/11/2023	5mg/l	29/11/2023	0	0	No	P limit of 2.5 mg/l from 31/12/2025
Teifi	LLANDYSUL	BG0010201	05/12/2023	5mg/l	12/12/2023	0	0	Yes	N/A
Teifi	TREGARON	BH0057801	22/11/2023	5mg/l	29/11/2023	2mg/l	31/03/2030	Yes	N/A
Teifi	PONTRHYDFENDIGAID	BN0040202	20/12/2023	5mg/l	27/12023	1.8mg/l	31/03/2030	Yes	N/A
Teifi	HENLLAN	BN0013701	19/01/2024	5mg/l	26/01/2024	0	0	Yes	N/A
Teifi	LLECHRYD	BG0024901	14/02/2024	5mg/l	21/02/2024	0	0	Yes	N/A
Teifi	DREFACH/VELINDRE	BH0060601	24/11/2023	5mg/l	01/12/2023	0	0	Yes	N/A
Teifi	PENCADER	BG0007801	23/04/2024	5mg/l	30/04/2024	3.5mg/l	31/03/2032	Yes	N/A
Teifi	ABERCYCH	BG0034501	05/12/2023	5mg/l	12/12/2023	0	0	Yes	N/A
Teifi	CWRTNEWYDD	BN0005601	10/04/2024	5mg/l	11/04/2024	0	0	Yes	N/A
Teifi	CAPEL IWAN	BN0054901	03/01/2024	5mg/l	10/01/2024	1.8mg/l	31/03/2030	Yes	N/A
Teifi	CELLAN	BN0008101	12/12/2023	5mg/l	19/12/2023	0	0	Yes	N/A
Teifi	CENARTH CEREDIGION	BP0101201	15/02/2023	5mg/l	22/02/2025	0	0	Yes	N/A
Teifi	CRIBYN	BG0027001	17/06/2024	5mg/l	24/06/2024	3.5mg/l	31/03/2032	Yes	N/A
Teifi	FFOSTRASOL	BH0072801	19/06/2024	5mg/l	26/06/2024	4.5	31/03/2032	Yes	N/A
Teifi	GORSGOCH	BG0043501	25/06/2024	5mg/l	02/07/2024	3mg/l	31/03/2032	Yes	N/A
Teifi	LLANFIHANGEL-AR-ARTH	BN0020802	06/11/2023	5mg/l	13/11/2023	2mg/l	31/12/2025	No	No limit of 2 mg/l in current permit (issued 24/10/2025)
Teifi	NEWCHAPEL	BP0219501	20/06/2024	5mg/l	27/06/2024	3.2mg/l	31/03/2030	Yes	N/A
Teifi	PENTRECWRT	BG0036101	01/03/2024	5mg/l	08/03/2024	0	0	Yes	N/A
Teifi	RHYDLEWIS LLANDYSUL	BP0013501	05/03/2024	5mg/l	12/03/2024	4.5mg/l	31/03/2030	Yes	N/A
Teifi	LLANGYBI LAMPETER	BG0021501	12/12/2023	5mg/l	19/12/2023	0	0	Yes	N/A
Teifi	BONCATH	BG0001201	15/01/2024	5mg/l	22/01/2024	0	0	Yes	N/A
Teifi	LLANDEWI BREFI	BG0023501	12/07/2023	1.5mg/l	12/07/2023	1.5mg/l	31/03/2030	No	Limit is 2 mg/l until 30/03/2030
Teifi	BEULAH CERED'N	BN0015801	19/01/2024	5mgl	26/01/2024	2mg/l	31/03/2030	Yes	N/A
Tywi	LLANDOVERY	BN0202701	07/08/2023	5mg/l	07/08/2023	0	0	Yes	N/A
Tywi	FFAIRFACH	BH0065401	26/02/2024	5mg/l	04/03/2024	0	0	Yes	N/A
Tywi	CAIO	BN0042101	29/04/2024	5mg/l	07/05/2024	0	0	Yes	N/A
Tywi	CILYCWM	BH0050901	11/04/2024	5mg/l	18/04/2024	0	0	Yes	N/A
Tywi	CWM IFOR	BN0103601	26/01/2024	5mg/l	02/02/2024	0	0	Yes	N/A
Tywi	SALEM	BP0219002	19/03/2024	5mg/l	26/03/2024	0	0	Yes	N/A
Tywi	BRECHFA	BN0000302	17/04/2024	5mg/l	24/04/2024	0	0	Yes	N/A
Tywi	CYNGHORDY	BJ0076001	24/01/2024	5mg/l	31/01/2024	0	0	Yes	N/A
Tywi	ABERGORLECH LLANDEILO	BN0007002	19/04/2024	5mg/l	26/04/2024	0	0	Yes	N/A
Tywi	CWRT HENRI CARMS	BN0018001	23/01/2024	5mg/l	30/01/2024	0	0	Yes	N/A
Tywi	FELINGWM	BJ0075601	27/02/2024	5mg/l	05/03/2024	0	0	Yes	N/A
Tywi	GWYNFE CAPEL GWYNFE	BP0164501	0	0	0	0	0	Yes	N/A
Tywi	LLANSAWEL	BH0062601	23/01/2024	5mg/l	30/01/2024	0	0	Yes	N/A
Tywi	MYDDFAI	BH0050801	18/01/2024	5mg/l	25/01/2024	0	0	Yes	N/A
Tywi	RHANDIRMWYN	BH0050701	23/02/2024	5mg/l	30/01/2024	0	0	Yes	N/A
Tywi	TALLEY	BN0085301	06/02/2024	5mg/l	13/02/2025	0	0	Yes	N/A
Tywi	LLANGADOG	BG0040001	10/07/2023	5mg/l	10/07/2023	0	0	Yes	N/A
Tywi	PONT-AR-GOTHI & NANTGAREDIG	BN0002601	10/07/2023	5mg/l	10/07/2023	0	0	Yes	N/A
Tywi	LLANFYNYDD	BN0077601	05/03/2024	5mg/l	12/03/2024	0	0	Yes	N/A
Usk	LLANFOIST	AB0038201	06/11/2023	5mg/l	13/11/2023	2mg/l	31/12/2025	Yes	N/A
Usk	BRECON	AB0041501	21/11/2023	5mg/l	28/11/2023	2mg/l	31/12/2025	Yes	N/A
Usk	CRICKHOWELL	AC0094701	31/01/2024	5mg/l	07/02/2025	0	0	Yes	N/A
Usk	LLANOVER	AB0043401	08/12/2023	5mg/l	15/12/2023	0	0	Yes	N/A
Usk	TALYBONT	AD0001701	14/02/2024	5mg/l	21/02/2024	1mg/l	31/03/2030	Yes	N/A
Usk	DEVAUDEN	AA0001901	15/05/2024	5mg/l	26/01/2027	0	0	Yes	N/A
Usk	SENNYBRIDGE ARMY CAMP	AC0140301	18/01/2024	5mg/l	25/01/2024	3.5mg/l	31/03/2030	Yes	N/A
Usk	LLANSPYDDID	AB0056601	21/12/2023	5mg/l	03/01/2024	0	0	Yes	N/A
Usk	LLANGYBI USK	AB0046601	24/01/2024	5mg/l	31/01/2024	0	0	Yes	N/A
Usk	LLANDDEW BRECON	AC0140701	19/06/2024	5mg/l	26/06/2024	4mg/l	31/03/2030	Yes	N/A
Usk	LIBANUS	AB0076001	08/12/2023	5mg/l	15/12/2023	2mg/l	31/03/2030	Yes	N/A
Usk	BWLCH LLANGYNIDIR	AB0049501	13/03/2024	5mg/l	20/03/2024	0	0	Yes	N/A
Usk	ABER	AA0026701	16/05/2024	5mg/l	23/05/2024	0	0	Yes	N/A
Usk	BRYN	AA0017501	19/07/2024	5mg/l	28/01/2028	0	0	Yes	N/A
Usk	COEDWAUNGAER	AB0043501	24/06/2024	5mg/l	01/07/2024	0	0	Yes	N/A
Usk	CRADOC PHASE 1	AN0035901	24/06/2024	5mg/l	01/07/2025	0	0	Yes	N/A
Usk	GROESFFORDD	AD0018101	27/06/2024	5mg/l	28/01/2028	0	0	Yes	N/A
Usk	LLANARTH MONMOUTHSHIRE	AC0091901	21/06/2024	5mg/l	28/06/2025	0	0	Yes	N/A
Usk	LITTLE MILL	AD0002501	31/01/2024	5mg/l	07/02/2024	0	0	Yes	N/A
Usk	LLANFYRNACH	AD0002101	31/07/2024	5mg/l	28/01/2028	2.5mg/l	31/03/2030	Yes	N/A
Usk	LLANSOY CHURCH LANE	AN0106401	0	0	0	0	0	Yes	N/A
Usk	LLANVAIR MONMOUTHSHIRE	AD0001501	20/02/2024	5mg/l	27/02/2025	0	0	No	P limit of 5 mg/l from 28/01/2028
Usk	TRECASTLE	AD0000901	21/12/2023	5mg/l	03/01/2024	0.75mg/l	31/03/2030	Yes	N/A
Usk	TRELLECH	AN0214601	25/06/2024	5mg/l	02/07/2025	0	0	Yes	N/A
Usk	TRETOWER CRICKHOWELL	AN0106601	0	0	0	0	0	Yes	N/A
Usk	LLANBEDR	AA0003101	19/06/2024	5mg/l	26/06/2024	1mg/l	31/03/2032	Yes	N/A
USK	GOYTRE	AC0116401	27/11/2023	5mg/l	04/12/2023	1.4mg/l	31/03/2030	Yes	N/A
USK	USK	AB0044801	12/12/2023	5mg/l	19/12/2023	0	0	Yes	N/A
Usk	ABERBAIDEN	AB0034101	23/01/2024	5mg/l	30/01/2025	0	0	Yes	N/A
Usk	BRYNMAWR	AC0085601	11/05/2023	1mg/l	31/12/2023	1mg/l	01/01/2024	Yes	N/A
Usk	RAGLAN	AC0140201	13/04/2023	1mg/l	13/04/2023	0	0	Yes	N/A
USK	LLANELLEN	AB0046101	08/02/2024	5mg/l	15/02/2024	0	0	Yes	N/A
Wye	TALGARTH BRONLLYS ROAD	AW1005301	14/08/2023	2mg/l	14/08/2023	0.25mg/l	31/03/2030	Yes	N/A
Wye	BUILTH WELLS	AW1000701	21/02/2024	5mg/l	28/02/2024	2.5mg/l	31/03/2025	Yes	N/A
Wye	LLANIGON	AW1003701	28/06/2024	5mg/l	05/07/2024	0.5mg/l	31/03/2030	Yes	N/A
Wye	LLANDRINDOD WELLS STW PARK LANE	AW1002901	06/11/2023	1.25mg/l	13/11/2023	0.8mg/l	31/03/2025	Yes	N/A
Wye	RHAYADER	AW1005201	26/03/2024	5mg/l	04/04/1012	3mg/l	31/03/2025	No	Typo in date column - should be 04/04/2024
Wye	LLYSWEN	AW1004201	15/02/2024	5mg/l	22/02/2025	0	0	Yes	N/A
Wye	ABERLLYNFI THREE COCKS	AW1000301	23/02/2023	5mg/l	01/03/2025	3.5mg/l	31/01/2030	Yes	N/A
Wye	CROSSGATES	AW1001101	31/01/2024	5mg/l	07/02/2025	2mg/l	31/03/2032	Yes	N/A
Wye	LLANWRTYD WELLS	AW1003901	23/11/2023	5mg/l	30/11/2023	2mg/l	22/12/2027	Yes	N/A
Wye	PENYBONT NR.LLANDRINDOD WELLS	AN0115601	18/01/2024	5mg/l	25/01/2024	0	0	Yes	N/A
Wye	PANDY MONMOUTHSHIRE	AH1002901	06/12/2023	5mg/l	13/12/2023	0	0	Yes	N/A
Wye	LLANGURIG	AW1003601	21/12/2023	5mg/l	03/01/2024	0	0	Yes	N/A
Wye	NEWBRIDGE-ON-WYE	AW1004401	15/02/2023	5mg/l	22/02/2023	0	0	Yes	N/A
Wye	LLANDEWI YSTRADENNY	AW1002801	0	0	0	0	0	Yes	N/A
Wye	CLYRO	AW1000901	25/04/2024	5mg/l	02/05/2025	0	0	Yes	N/A
Wye	BEULAH	AW1000501	06/11/2023	5mg/l	13/11/2023	3mg/l	31/03/2030	Yes	N/A
Wye	LLANYRE	AW1004001	01/02/2024	5mg/l	08/02/2024	0	0	Yes	N/A
Wye	CILMERY	AW1001001	26/01/2024	5mg/l	02/02/2025	0	0	No	P limit of 4 mg/l from 31/03/2030
Wye	GLASBURY NR HAY ON WYE	AN0333401/AW1002101	26/06/2024	5mg/l	26/01/2027	0	0	Yes	N/A
Wye	BUILTH ROAD	AW1000601	26/01/2024	5mg/l	02/02/2025	0	0	No	P limit of 3 mg/l from 26/01/2028
Wye	CEFN GORWYDD	AN0180001	24/06/2024	5mg/l	01/07/2025	0	0	Yes	N/A
Wye	DINGESTOW MONMOUTH	AS1000701	09/08/2024	5mg/l	28/01/2028	0	0	Yes	N/A
Wye	ELAN VILLAGE	AW1001401	0	0	0	0	0	Yes	N/A
Wye	GARTH	AW1002001	07/12/2023	5mg/l	14/12/2023	0	0	Yes	N/A
Wye	GROSMONT	AH1001001	25/07/2024	5mg/l	28/01/2028	0	0	Yes	N/A
Wye	GWENDDWR	AW1002201	0	0	0	0	0	Yes	N/A
Wye	LLANDEGLEY	AW1002701	11/07/2024	1mg/l	28/01/2028	0	0	Yes	N/A
Wye	LLANGAMMARCH WELLS	AW1003301	18/12/2023	5mg/l	27/12/2023	0	0	Yes	N/A
Wye	MONMOUTH REDBROOK ROAD	AS1003201	06/11/2003	2mg/l	13/11/2023	0	0	Yes	N/A
Wye	NEW RADNOR	AW1004501	16/06/2024	5mg/l	25/06/2024	0	0	Yes	N/A
Wye	LLANDDEWI Rhydderch	AS1002101	19/06/2024	5mg/l	26/06/2025	0	0	Yes	N/A

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