You can use the background package and its bottom option; using the some option, the material will only be added in those pages in which you invoke \BgThispage explicitly; a little example:
\documentclass{article}
\usepackage[scale=0.82, top=1.5cm, bottom=2.5cm,paperheight=8cm,showframe]{geometry}
\usepackage[some,bottom]{background}
\usepackage{lipsum}
\SetBgContents{Some test text}
\SetBgScale{1}
\SetBgOpacity{1}
\SetBgColor{blue}
\SetBgVshift{1cm}
\begin{document}
\lipsum[4]\footnote{A test footnote}\BgThispage
\lipsum[1-6]
\end{document}
I changed the value for paperheight and used the showframe option only for convenience in the example. Here's an image of the first two pages obtained with my example code:

Another option would be to use the footer to place the text; this can be done using the fancyhdr or the titleps packages; an example with fancyhdr:
\documentclass{article}
\usepackage[scale=0.82, top=1.5cm, bottom=2.5cm,paperheight=8cm,showframe]{geometry}
\usepackage{fancyhdr}
\usepackage{lipsum}
\fancypagestyle{specialfooter}{%
\fancyhf{}
\fancyfoot[L]{Some test text}
\fancyfoot[C]{\thepage}
}
\begin{document}
\thispagestyle{specialfooter}
\lipsum[4]\footnote{A test footnote}
\lipsum[1-6]
\end{document}

Now that additional information has been provided (the OP is using moderncv), here's an example using this document class and the background package:
\documentclass{moderncv}
\usepackage[scale=0.82, top=1.5cm, bottom=2.5cm,paperheight=10cm]{geometry}
\usepackage[some,bottom]{background}
\usepackage{lipsum}
\SetBgContents{Some test text added with the \texttt{background} package}
\SetBgScale{1}
\SetBgOpacity{1}
\SetBgColor{blue}
\SetBgVshift{0.5cm}
\moderncvstyle{classic}
\moderncvcolor{blue}
\firstname{John}
\familyname{Doe}
\mobile{+1~(234)~567~890}
\phone{+2~(345)~678~901}
\email{john@doe.org}
\begin{document}
\makecvtitle
\BgThispage
\section{Education-First page}
\cventry{year--year}{Degree}{Institution}{City}{\textit{Grade}}{Description}
\cventry{year--year}{Degree}{Institution}{City}{\textit{Grade}}{Description}
\section{Education-Second page}
\cventry{year--year}{Degree}{Institution}{City}{\textit{Grade}}{Description}
\cventry{year--year}{Degree}{Institution}{City}{\textit{Grade}}{Description}
\end{document}

UPDATE:
To implement the updated format for the background package, you can use:
\usepackage[pages=some,placement=bottom,%
color=blue,opacity=1,scale=1,vshift=0.5cm]{background}
\backgroundsetup{contents={Some test text added with the \texttt{background} package}}
instead of:
\usepackage[some,bottom]{background}
\SetBgContents{Some test text added with the \texttt{background} package}
\SetBgScale{1}
\SetBgOpacity{1}
\SetBgColor{blue}
\SetBgVshift{0.5cm}