(1) the statement provides such information for a representative sampling of distribution point samples and a notice to the effect that such information for each source of water is included in a supplement available to each customer upon request from the water works corporation; and

(2) the supplement is included in each copy of the water supply statement provided to customers upon request under subdivision one of this section and provided to commissioners under subdivision two of this section; and

(3) the supplement shall be

(i) published in a notice at least one-half page in size, in one newspaper of general circulation within the water district; or

(ii) made available on a public electronic bulletin board, along with the supplements from the two prior years, if such prior supplements exist, and notice of the availability of such information on a public electronic bulletin board shall be clearly provided on each billing statement and shall be published in a newspaper of general circulation within the water district; or

(iii) made available at all New York state documents information access centers, documents reference centers, documents depository libraries and documents research depository libraries within the water district and if no such libraries exist within the water district, at a public library within the water district, and notice of the availability of the supplement at such library of libraries shall be clearly provided on each billing statement and shall be published in a newspaper of general circulation within the water district. Such supplement need not be included in the copy of the annual water supply statement mailed to each customer or published under subdivision one of this section.