RHYL beach has regained a minimum water quality standard after one of the driest summers in recent memory.
Sea charity The Marine Conservation Society (MCS) upgraded the resort’s beach to meet “mandatory bathing water standards”, after it failed in 2013.
Prestatyn and Pensarn beaches have both had their ratings upgraded.
The MCS Good Beach Guide 2014 uses data collected by Welsh Water, Denbighshire Council and Conwy County Council, last year to assess water quality, with mandatory, the third out of four ratings.
Chris Ruane MP for Vale of Clwyd said: “It is great to see that there has been the improvement in the water quality at Rhyl.
“In addition to this improvement Welsh Water is also currently carrying out work which should vastly reduce the number of incidents spilling into the River Clwyd.
“In the Vale of Clwyd we are not only blessed to have gorgeous countryside but we also have two towns with wonderful beaches and we need to ensure that there is the water quality to go with them and I hope this improvement continues.”
Rhyl's failure to meet the minimum standards in 2013 was blamed on heavy rainfall, the highest recorded level in almost 100 years, for water run-off from urban and agricultural land into the River Clwyd which flows into the waters off Rhyl.
Splash Point and Ffrith Beach remained at the mandatory level, Kinmel Bay and Barkby Beach retained their recommended levels of water quality.
Gronant Dunes was downgraded from recommended to mandatory while Prestatyn and Pensarn were upgraded from mandatory to recommended.
The MCS has recommended 109 out of 152 (71.7 per cent) Welsh beaches tested during last summer as having excellent water quality, 11 more than the previous year.
There was also one less failure than the previous year, with just four beaches tested last summer failing to reach minimum water quality standards.
MCS Wales programme manager, Gill Bell, says she hopes the latest figures will be a boost to tourism in Wales after several previously wet summers led to a drop in bathing water quality with pollution running into the sea from rural and urban areas and overloaded sewers.