The reason I asked if it was the centre newest leaves (for the first picture only) is because interveinal chlorosis is typically from an iron and/or manganese deficiency or a magnesium deficiency. If it is iron or manganese deficiency it will affect the newest leaves, i.e the new emerging central ones, first and in daylilies leaves may also become paler at their bases.. If it is magnesium it usually affects the older leaves first. With the history it's more likely to be iron and/or manganese deficiency because they are caused by high pH (which would be expected with the lime in the water). Some daylilies seem particularly susceptible to this and it seems to be a fairly common problem. Magnesium deficiency is more likely in more acidic conditions.
A typical fertilizer will not help because even if it does contain iron and manganese they may, depending on the form they are in, also be made unavailable by the pH (if the nitrogen source is an acidifying one it may help somewhat). The deficiency is not usually because of a shortage of iron or manganese in the soil but because the pH makes the nutrients unavailable to the plant. In the picture in the Daylily Dictionary that Seedfork posted a link to, that was manganese deficiency caused by a lime application and it was later corrected with sulfur to lower the pH. Iron chlorosis can progress to almost all white although it starts off just being pale between the veins with the veins still green, as in your first picture. However it doesn't look like the other two pictures.
