| Aberdulais Falls | Afon Dulais | SS77149955 (277143,199551) | |  |
|---|
| Aber Falls/Rhaeadr Fawr | Afon Goch/Afon Rhaeadr-fawr | SH66857003 (266854,370027) | |  |
|---|
| Aber Fforest Waterfall | Nant Fforest | SN02483931 (202482,239310) | Common but unofficial name |  |
|---|
| Afon Ceiriog | Afon Ceiriog | SJ13053676 (313052,336762) | Multiple waterfalls, no official names |  |
|---|
| Afon Croesor | Afon Croesor | SH62034370 (262027,343699) | Multiple waterfalls, no official names |  |
|---|
| Afon Cwm Llan | Afon Cwm Llan | SH62345163 (262337,351631) | Multiple waterfalls, no official names |  |
|---|
| Afon Dringarth | Afon Dringarth | SN94301611 (294303,216106) | Multiple waterfalls, no official names |  |
|---|
| Afon Du-bach | Afon Du-bach | SH70924537 (270915,345367) | No official name |  |
|---|
| Afon Dulyn Waterfall | Afon Dulyn | SH75516829 (275514,368285) | No official name |  |
|---|
| Afon Hengwm | Afon Hengwm | SN77439322 (277428,293216) | No official name |  |
|---|
| Afon Hore Waterfall | Afon Hore | SN82678770 (282668,287704) | No official name |  |
|---|
| Afon Llia | Afon Llia | SN92991533 (292986,215326) | No official name |  |
|---|
| Afon Lliw | Afon Lliw | SH82353251 (282354,332508) | No official name |  |
|---|
| Afon Tarennig | Afon Tarennig | SN79468425 (279461,284247) | Multiple waterfalls, no official names |  |
|---|
| Afon Twrch | Afon Twrch tributary | SN77351542 (277347,215415) | No official name |  |
|---|
| Amarch Fall | Cwm Amarch stream | SH71051087 (271053,310868) | No official name |  |
|---|
| Arthog Waterfalls | Afon Arthog | SH64751432 (264754,314321) | Multiple waterfalls |  |
|---|
| Berw Ddu | Dare River | SN96190204 (296194,202037) | Normally dry |  |
|---|
| Berw Nant yr Ychen/Angel Falls | Nant yr Ychen | SS91599923 (291587,199230) | Angel Falls is an unofficial name used by ice climbers |  |
|---|
| Bryn Mor | Nant Gwndwn-gwyn | SN78747458 (278739,274584) | Name given by the landowner |  |
|---|
| Button's Waterfall | Nant Dyar | SO23671214 (323665,212138) | Unofficial name used locally |  |
|---|
| Cadair Cataracts | Nant Cadair | SH72811175 (272811,311745) | Common but unofficial name |  |
|---|
| Caerfanell Falls/Blaen-y-Glyn | Afon Caerfanell | SO06081747 (306080,217466) | Multiple waterfalls, no official names |  |
|---|
| Carreg Ddefod Falls | Afon Conwy | SH78104447 (278097,344468) | No official name |  |
|---|
| Cavern Cascade | Nant Gau | SN77477272 (277466,272716) | |  |
|---|
| Cenarth Falls | Afon Teifi | SN27004161 (226997,241612) | |  |
|---|
| Cilhepste Falls | Afon Hepste | SN92670988 (292670,209880) | Multiple waterfalls |  |
|---|
| Ciloerwynt Falls | Afon Claerwen | SN88406274 (288402,262740) | Common but unofficial name |  |
|---|
| Ciloerwynt Lower Falls | Afon Claerwen | SN89146196 (289142,261957) | No official name |  |
|---|
| Cleddon Falls | River Wye tributary | SO52050395 (352045,203949) | |  |
|---|
| Clydach Falls/Sgwd Clydach | River Clydach (Neath) | SS73729812 (273721,198116) | Common but unofficial name |  |
|---|
| Clydach Tributary Waterfalls | Nant Dyar-fach, Nant Llam-march, River Clydach tributaries | SO21931179 (321931,211786) | Multiple waterfalls, no official names |  |
|---|
| Conwy Falls/Rhaeadr y Graig Lwyd | River Conwy | SH80905348 (280902,353483) | Multiple waterfalls |  |
|---|
| Corrwg Falls | Afon Corrwg and tributaries, Nant Pigws-y-waun | SN89550221 (289546,202210) | Multiple waterfalls, no official names |  |
|---|
| Corrwg Fechan Falls | Afon Corrwg Fechan and tributaries | SN87990158 (287991,201580) | Multiple waterfalls, no official names |  |
|---|
| Craig Pwll-du | Bach Howey/Bachawy | SO12104355 (312103,243552) | |  |
|---|
| Craig y Llyn | Nant Llyn Coch-hwyad | SH91551101 (291552,311009) | No official name | |
|---|
| Craig y Pistyll | Afon Leri | SN71308549 (271296,285486) | No official name |  |
|---|
| Cwm Cerrig-duon Falls | Nant Cwm Cerrig-duon | SH91641381 (291642,313807) | No official name | |
|---|
| Cwm Dwfn Falls | Cwm Dwfn | SN84599665 (284593,296648) | No official name | |
|---|
| Cwm Dyar Waterfalls | Nant Dyar | SO23221280 (323222,212795) | Multiple waterfalls, no official names |  |
|---|
| Cwm Llwch | Nant Cwm Llwch and tributary | SO00622278 (300619,222777) | Multiple waterfalls, no official names |  |
|---|
| Cwm Nantmelyn Waterfall | Cwm Nantmelyn | SO20191233 (320188,212326) | No official name |  |
|---|
| Cwmorthin Falls | Afon Cwmorthin | SH68214500 (268205,344998) | Common but unofficial name |  |
|---|
| Cwm Pwll-y-Rhyd | Afon Nedd Fechan | SN91141380 (291137,213800) | Normally dry |  |
|---|
| Cwm Rhaeadr Waterfall | Nant y Rhaeadr | SN75534371 (275530,243705) | No official name |  |
|---|
| Cwm Trappi Waterfalls | Nant Trappi | SO16343244 (316337,232444) | Multiple waterfalls, no official names |  |
|---|
| Cyfyng Falls | Afon Llugwy | SH73465714 (273459,357142) | Multiple waterfalls |  |
|---|
| Devil's Appendix | Afon Llyn Cwm tributary | SH63865892 (263859,358917) | Unofficial name used by ice climbers |  |
|---|
| Devil's Kitchen | Afon Llyn Cwm | SH63835881 (263827,358805) | |  |
|---|
| Devil's Punchbowl | River Mynach | SN74187701 (274178,277011) | |  |
|---|
| Devil's Waterfall/Pwll Cwn | River Clydach | SO21551250 (321551,212501) | |  |
|---|
| Diffwys Dwr/Craig y Rhaeadr | Afon Gennog tributary | SH62045612 (262040,356116) | Craig y Rhaeadr is used only by ice climbers |  |
|---|
| Dog Pool | Afon Llia | SN93071533 (293071,215327) | Unofficial name used locally |  |
|---|
| Dolgoch Falls Rhaeadr Isaf/Pistyll Arian | Nant Dol-goch | SH65060435 (265061,304351) | |  |
|---|
| Dolgoch Falls Rhaeadr Uchaf | Nant Dol-goch | SH65470423 (265471,304231) | |  |
|---|
| Dulas Falls | Afon Dulas | SH77661002 (277655,310018) | Common but unofficial name |  |
|---|
| Dulas Gorge Falls | Afon Dulas | SN83029480 (283017,294795) | No official name |  |
|---|
| Dwfr Ddisgynfa Cwm-du | Afon Cwmau | SN04083373 (204075,233734) | |  |
|---|
| Eglwys Faen Waterfall Entrance | No official name | SO19331565 (319325,215647) | |  |
|---|
| Fairy Falls/Rhaeadr y Tylwyth Teg | Afon Crafnant | SH77856305 (277854,363050) | Multiple waterfalls |  |
|---|
| Ffrwd Fawr | Afon Twymyn | SN87199398 (287192,293977) | |  |
|---|
| Ffrwd Ferin/Rhaeadr Myherin | Afon Myherin | SN79758072 (279745,280720) | |  |
|---|
| Ffrwd-grech Waterfall | Nant Cwm Llwch | SO02082643 (302077,226432) | |  |
|---|
| Ffrwd yr Ydfran | Afon Ystwyth tributary | SN82277635 (282267,276349) | Steep stream; not a proper waterfall |  |
|---|
| Ffrwd Milwyn | Nant Milwyn | SN79057321 (279052,273214) | |  |
|---|
| Ffrwd Wen | Blaen Duhonw | SN97704581 (297696,245814) | |  |
|---|
| Furnace Falls | Afon Einion | SN68539511 (268533,295111) | Common but unofficial name |  |
|---|
| Glynhir Waterfall | Afon Llwchwr | SN64161513 (264157,215132) | |  |
|---|
| Glyn Tarell Tributaries | Nant y Gerdinen and Afon Tarell tributaries | SN97012078 (297012,220780) | Multiple waterfalls, no official names |  |
|---|
| Grey Mare's Tail/Rhaeadr y Parc Mawr | Nant Gwydyr | SH78946102 (278942,361015) | |  |
|---|
| Grogwynion Falls | Afon Ystwyth tributary | SN72337249 (272332,272494) | |  |
|---|
| Gyfarllwyd Falls | Afon Rheidol | SN74237757 (274225,277568) | |  |
|---|
| Hirgwm Waterfalls | Hirgwm | SH66731976 (266729,319758) | Common but unofficial name |  |
|---|
| Horseshoe Falls/Sgwd y Bedol | Afon Nedd Fechan | SN90260970 (290258,209703) | |  |
|---|
| Joe's Waterfall | Nant Tawe Fechan tributary | SN84221807 (284223,218069) | Unofficial name used by ice climbers |  |
|---|
| Llaethnant | Llaethnant | SH89642160 (289639,321602) | No official name |  |
|---|
| Llanberis Falls/Ceunant Mawr | Afon Arddu | SH57815929 (257812,359288) | Multiple waterfalls |  |
|---|
| Llanedw Falls | River Edw | SO12515013 (312510,250134) | Unofficial name used by canoeists |  |
|---|
| Llech Sychryd | Nant Hir | SN99120728 (299118,207280) | |  |
|---|
| Llynfell Falls | Afon Llynfell | SN83891603 (283892,216028) | |  |
|---|
| Llyn yr Oror | Afon Aled | SH92576142 (292565,361417) | | |
|---|
| Machno Falls | Afon Machno | SH80835321 (280832,353213) | |  |
|---|
| Maesglase Waterfall | Nant Maesglase | SH82721406 (282720,314055) | Common but unofficial name |  |
|---|
| Maesgwm | Afon Maesgwm | SH73014915 (273007,349153) | | |
|---|
| Melincourt Falls/Sgwd Rhyd-yr-Hesg | Melin Court Brook | SN82590165 (282588,201651) | |  |
|---|
| Merchon Falls | Afon Merchon | SN73254184 (273247,241837) | No official name |  |
|---|
| Mill Falls | River Usk | SO13482013 (313478,220125) | Unofficial name used by canoeists |  |
|---|
| Mossy Seat Falls | Nant Bwlchgwallter | SN76137284 (276126,272841) | |  |
|---|
| Mynach Falls | River Mynach | SN74167716 (274158,277163) | Multiple waterfalls |  |
|---|
| Nant Bwa-drain | Nant Bwa-drain | SN71537916 (271530,279163) | No official name |  |
|---|
| Nant Bwrefwr | Nant Bwrefwr | SO05621753 (305617,217525) | Multiple waterfalls, no official names |  |
|---|
| Nant Bwch | Nant Bwch | SO23663231 (323662,232309) | No official name |  |
|---|
| Nant Carnfoesen Waterfall | Nant Carnfoesen | SN91700178 (291699,201779) | Common but unofficial name |  |
|---|
| Nant Chwarelmelyn | Nant Chwarelmelyn | SN80228052 (280215,280515) | No official name |  |
|---|
| Nant Crew | Nant Crew | SO00311859 (300312,218592) | Multiple waterfalls, no official names |  |
|---|
| Nant Cwm-cas Falls | Nant Cwm-cas | SS89629971 (289617,199707) | No official name |  |
|---|
| Nant Cwm-du Falls | Nant Cwm-du | SN81057378 (281047,273784) | No official name |  |
|---|
| Nant Ddeiliog Falls | Nant Ddeiliog | SN86709531 (286703,295310) | No official name | |
|---|
| Nant Ddu | Nant Ddu | SO00501550 (300504,215502) | Multiple waterfalls, no official names |  |
|---|
| Nant Gwynllyn Falls | Nant Gwynllyn | SN94176948 (294165,269478) | Multiple waterfalls, no official names |  |
|---|
| Nant Meliorath Falls | Nant Meliorath | SN89430012 (289425,200117) | No official name |  |
|---|
| Nant Melyn Waterfall | Nant Melyn | SN91690159 (291686,201589) | Common but unofficial name |  |
|---|
| Nant Tawe Fechan Falls | Nant Tawe Fechan | SN84241878 (284237,218777) | Multiple waterfalls, no official names |  |
|---|
| Nant y Berws Falls | Nant y Berws | SN73587214 (273580,272142) | No official name |  |
|---|
| Nant y Cae Falls | Nant y Cae | SN82177480 (282165,274800) | Multiple waterfalls, no official names |  |
|---|
| Nant y Cafn Falls | Nant y Cafn | SH89632066 (289629,320659) | No official name |  |
|---|
| Nant y Gwair Falls | Nant y Gwair and tributaries | SS90989876 (290983,198757) | Multiple waterfalls, no official names |  |
|---|
| Nant y Gwaith Falls | Nant y Gwaith | SN80367489 (280363,274886) | Multiple waterfalls, no official names |  |
|---|
| Nant y Llyn | Nant y Llyn | SN84812052 (284809,220519) | Multiple waterfalls, no official names |  |
|---|
| Nant yr Allor Waterfall | Nant yr Allor | SS88159936 (288147,199357) | No official name |  |
|---|
| Nant y Sarn Falls | Nant y Sarn | SN93487131 (293477,271305) | Multiple waterfalls, no official names |  |
|---|
| Nant Ystalwyn Waterfall | River Towy tributary | SN80715729 (280710,257287) | Common but unofficial name |  |
|---|
| Needle Falls | Nant Llech tributary | SN84611196 (284610,211960) | Common but unofficial name |  |
|---|
| Ogof Clogwyn | River Clydach tributary | SO21301239 (321299,212388) | |  |
|---|
| Ogof Tarddiant Hepste | Afon Hepste | SN93660970 (293663,209698) | |  |
|---|
| Pandy Falls | Afon Machno | SH80625286 (280622,352860) | |  |
|---|
| Pen Pistyll/Pistyll Brynach | No official name | SN05374113 (205369,241132) | |  |
|---|
| Pen Pych Waterfall/Berw Wion | Nant Lluest/Nant Berw Wion | SS91809971 (291801,199709) | "Berw Wion" on the map, but "Pen Pych waterfall" locally |  |
|---|
| Penbryn Waterfall | Hoffnant | SN29615205 (229610,252049) | No official name |  |
|---|
| Pistyll Blaen-y-cwm | Afon Tanat | SJ00742764 (300737,327644) | Multiple waterfalls |  |
|---|
| Pistyll Cablyd | Nant Achlas | SJ01522671 (301519,326711) | |  |
|---|
| Pistyll Cain | Afon Gain | SH73382753 (273380,327530) | |  |
|---|
| Pistyll Cim | No official name | SH32262477 (232264,324771) | |  |
|---|
| Pistyll Crawnon | Afon Crawnon | SO09531493 (309527,214926) | |  |
|---|
| Pistyll Dû | Nant y Graean | SH73613042 (273613,330423) | Multiple waterfalls |  |
|---|
| Pistyll Eunant/Eunant Waterfalls | Eunant | SH94562300 (294557,323004) | Multiple waterfalls, no official names |  |
|---|
| Pistyll Goleu | Sychnant | ST03339634 (303330,196342) | |  |
|---|
| Pistyll Gwyn | Afon Las | SH62235809 (262230,358088) | |  |
|---|
| Pistyll Gwyn | Afon Pumryd | SH88461961 (288464,319609) | |  |
|---|
| Pistyll Gwyn | Nant-hir | SH84473669 (284466,336685) | Multiple waterfalls |  |
|---|
| Pistyll Gwyn | Nant Llyn-du | SH67212989 (267210,329888) | |  |
|---|
| Pistyll Gwyn | Nant y Pistyll-gwyn | SH75074299 (275070,342987) | Name implied by the stream name | |
|---|
| Pistyll Henfynachlog | Afon Eiddon | SH80762310 (280762,323100) | |  |
|---|
| Pistyll Mawr/Coal Tar Cave Resurgence Waterfall | River Clydach tributary | SO20071218 (320068,212178) | |  |
|---|
| Pistyll Rhaeadr | Afon Disgynfa/Afon Rhaeadr | SJ07272950 (307265,329502) | |  |
|---|
| Pistyll Rhyd-y-meinciau/Rhiwargor Falls | Afon Eiddew | SH95282465 (295276,324653) | |  |
|---|
| Pistyll y Gaseg | No official name | SH20832654 (220831,326542) | |  |
|---|
| Pistyll y Graig-ddu | Nant y Craig-ddu | SJ09491892 (309492,318922) | Multiple waterfalls |  |
|---|
| Pistyll y Gyfyng | Afon Goch | SJ02112459 (302109,324586) | Multiple waterfalls |  |
|---|
| Pistyll y Llyn/Cwm Rhaeadr Falls | Llyfnant | SN75399425 (275385,294248) | Multiple waterfalls |  |
|---|
| Pistyll y Pandy | Afon Conwy | SH83954839 (283952,348390) | |  |
|---|
| Pontsarn Blue Pool/Pwll Glas | Afon Taf Fechan | SO04480967 (304483,209669) | |  |
|---|
| Pont-y-Pair Falls | Afon Llugwy | SH79135672 (279126,356717) | |  |
|---|
| Pump Pwll | Afon Pyrddin | SN89730925 (289732,209245) | |  |
|---|
| Pwll Annie | Nant Ffrwd | SO02390754 (302393,207537) | |  |
|---|
| Pwll Crochan/Clydach Lower Waterfall | River Clydach | SO22241266 (322236,212661) | |  |
|---|
| Pwll-Du | Afon Sychryd | SN92610688 (292607,206877) | |  |
|---|
| Pwll Milast-fach | Afon Sychryd, Nant Llechau and Nant Wyrfa | SN92670684 (292672,206842) | |  |
|---|
| Pwll Rhys | River Clydach | SO23751412 (323753,214116) | |  |
|---|
| Pwll Uffern | Afon Pysgotwr Fawr, Afon Pysgotwr Fach | SN74644991 (274637,249910) | Multiple waterfalls |  |
|---|
| Pwll Uffern-Gothi | Afon Cothi | SN71784662 (271782,246622) | |  |
|---|
| Pwll y Berw | Afon Sychryd | SN91640801 (291639,208009) | |  |
|---|
| Pwll y Crochan | Afon Sychryd | SN92550713 (292549,207126) | |  |
|---|
| Pwll-y-Gerwyn/Gadlys Falls | Dare River | SN99200262 (299201,202623) | Pwll-y-Gerwyn is the official name |  |
|---|
| Pwll y March | Afon Gwesyn | SN85395438 (285391,254383) | |  |
|---|
| Pwll-yr-Wydden | No official name | SN83021577 (283015,215771) | Normally dry |  |
|---|
| Pwll-y-Wrach | River Ennig | SO16933267 (316934,232667) | |  |
|---|
| Pwll-y-Wrach Lower Waterfall | River Ennig | SO16623262 (316617,232620) | |  |
|---|
| Pyrgad Falls | Nant Pyrgad | SO10951556 (310949,215556) | Multiple waterfalls, no official names |  |
|---|
| Rhaeadr Blaenhafren | River Severn | SN83578837 (283567,288367) | |  |
|---|
| Rhaeadr Cwm Dyli | Afon Glaslyn | SH65045429 (265040,354293) | Common but unofficial name |  |
|---|
| Rhaeadr Cymerau | Afon Goedol | SH69084315 (269080,343152) | Multiple waterfalls |  |
|---|
| Rhaeadr Cynfal | Afon Cynfal | SH70424118 (270416,341180) | Multiple waterfalls |  |
|---|
| Rhaeadr Cynwyd | Afon Trystion | SJ06344054 (306335,340535) | Multiple waterfalls |  |
|---|
| Rhaeadr Ddu | Afon Dulas tributary | SN81129336 (281117,293363) | Steep stream; not a proper waterfall |  |
|---|
| Rhaeadr Porth-llwyd | Afon Porth-llwyd | SH76376759 (276368,367588) | Normally dry | |
|---|
| Rhaeadr Du/Black Waterfalls | Afon Gamlan | SH72222444 (272218,324438) | Multiple waterfalls |  |
|---|
| Rhaeadr Du | Afon Prysor | SH66683883 (266684,338825) | |  |
|---|
| Rhaeadr Dyserth | Afon Ffyddion | SJ05697929 (305688,379287) | |  |
|---|
| Rhaeadr Fach/Rhaeadr-bach | Afon Rhaeadr-bach | SH66506965 (266496,369652) | Multiple waterfalls |  |
|---|
| Rhaeadr Gwy | River Wye | SN96836785 (296830,267848) | Waterfall destroyed |  |
|---|
| Rhaeadr Llechweddfwyalchen | Afon Dwrnudon | SH86502737 (286503,327365) | |  |
|---|
| Rhaeadr Mawddach | Afon Mawddach | SH73572750 (273573,327503) | |  |
|---|
| Rhaeadr Nantcol | Afon Cwmnantcol | SH60852674 (260852,326743) | Multiple waterfalls |  |
|---|
| Rhaeadr Ogwen | Afon Ogwen | SH64826053 (264817,360525) | Multiple waterfalls |  |
|---|
| Rhaeadr Peiran | Nant Peiran | SN77007357 (276999,273571) | Multiple waterfalls |  |
|---|
| Rhaeadr Rhosan | Nant Rhosan | SN75154277 (275150,242772) | No official name |  |
|---|
| Rhaeadr Tan-y-grisiau | Afon Cwmorthin | SH68254551 (268246,345514) | Unofficial name used locally |  |
|---|
| Rhaeadr Wen | Afon Dulas tributary | SN81519344 (281512,293443) | Steep stream; not a proper waterfall |  |
|---|
| Rhaeadr y Bedd | Afon Aled | SH91575993 (291568,359927) | Multiple waterfalls (reservoir controls flow) |  |
|---|
| Rhaeadr y Carreg Wen | Nant y Graig-wen | SH82941737 (282937,317367) | Multiple waterfalls |  |
|---|
| Rhaeadr y Cwm | Afon Cynfal | SH74004169 (273998,341687) | Multiple waterfalls |  |
|---|
| Rheidol Falls | Afon Rheidol | SN70947889 (270940,278891) | |  |
|---|
| Rhondda Fawr Waterfall | Afon Rhondda Fawr | SN92240152 (292236,201522) | Common but unofficial name |  |
|---|
| Rhuddnant Gorge Falls | Nant Rhuddnant | SN80177842 (280167,278420) | Multiple waterfalls, no official names |  |
|---|
| Salmon Pool | Bach Howey/Bachawy | SO11934348 (311928,243477) | |  |
|---|
| Severn Break-its-neck/Hafren-Torri-Gwddf | River Severn | SN86308673 (286304,286732) | |  |
|---|
| Severn Cascades | River Severn | SN85378716 (285371,287164) | Multiple waterfalls, no official names |  |
|---|
| Sgwd Clun Gwyn | Afon Mellte | SN92461095 (292460,210947) | |  |
|---|
| Sgwd Ddu | Afon Haffes | SN82931797 (282925,217972) | |  |
|---|
| Sgwd Ddwli | Afon Nedd Fechan | SN90560991 (290556,209906) | |  |
|---|
| Sgwd Ddwli Isaf | Afon Nedd Fechan | SN90400980 (290396,209796) | Multiple waterfalls |  |
|---|
| Sgwd Einion Gam | Afon Pyrddin | SN89050935 (289045,209353) | |  |
|---|
| Sgwd Gwladus/Lady Falls | Afon Pyrddin | SN89600931 (289599,209308) | |  |
|---|
| Sgwd Henrhyd | Nant Llech | SN85391193 (285388,211928) | |  |
|---|
| Sgwd Isaf Clun Gwyn | Afon Mellte | SN92381062 (292380,210617) | Multiple waterfalls |  |
|---|
| Sgwd Wen | Nant y Cae | SN85554578 (285554,245784) | Multiple waterfalls |  |
|---|
| Sgwd y Ffrwd | Afon Gwesyn | SN86135613 (286128,256133) | Multiple waterfalls |  |
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| Sgwd y Pannwr | Afon Mellte | SN92281033 (292280,210327) | |  |
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| Sgwd yr Argoed | Nant yr Argoed | SN87300432 (287304,204323) | |  |
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| Sgwd yr Eira | Afon Hepste | SN92880999 (292875,209985) | |  |
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| Spuhler's Folly/Pwll yr Hesg | River Usk | SO15872027 (315867,220272) | Unofficial name used by canoeists |  |
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| Swallow Falls/Rhaeadr Ewynnol | Afon Llugwy | SH76475774 (276468,357739) | Multiple waterfalls |  |
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| Sychryd Cascades/Sgydau Sychryd | Afon Sychryd | SN91470800 (291465,208000) | Multiple waterfalls |  |
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| Sychryd Waterfall | Afon Sychryd | SN91650798 (291652,207979) | Common but unofficial name |  |
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| Tarren Rhiw-maen Falls | Ogwr Fawr | SS92609468 (292597,194682) | No official name |  |
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| The (Glynhir) Cascade | Afon Llwchwr tributary | SN64171508 (264167,215084) | Name given by the landowner |  |
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| The Polo Mint | Nant Dyar | SO23161288 (323158,212883) | Unofficial name used by gorge walkers |  |
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| The Sheep Dip | Afon Mellte | SN92300998 (292301,209983) | Unofficial name used by gorge walkers |  |
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| Torpantau Falls | Blaen Caerfanell | SO05131919 (305128,219192) | Unofficial name used by ice climbers |  |
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| Torrent Walk | Afon Clywedog | SH75941821 (275939,318206) | |  |
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| Trawsnant Waterfall | Afon Trannon | SN91139301 (291130,293012) | Common but unofficial name (misnomer) |  |
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| Tresaith Waterfall | Afon Saith | SN27925168 (227924,251679) | |  |
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| Twyn y Crug Waterfall | Afon Corrwg Fechan tributary | SS87489981 (287484,199809) | No official name |  |
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| V Falls | Nant Ganol, Nant Mawr | SN94631562 (294632,215622) | Common but unofficial name |  |
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| Washpool Falls | Afon Llygwy/River Lugg | SO18447298 (318440,272977) | Unofficial name used locally |  |
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| Water Break-its-neck/Dŵr-Torri-Gwddf | Black Brook tributary | SO18326004 (318321,260037) | |  |
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| Water-break-its-neck | Afon Llygwy/River Lugg tributary | SO18287361 (318282,273605) | |  |
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| Waterfall Cave Resurgence Waterfall | River Clydach tributary | SO21311240 (321310,212400) | No official name |  |
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| Y Gerwn | Nant Hawen | SN31525404 (231517,254035) | |  |
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