2 Custom Post Types Sharing 1 Taxonomy Term

I have two custom post types called distributors and installers. They share a taxonomy called states.

What I want to do is display a page listing all the states for the installers and a page listing all the states for the distributors. There will be installers and distributors in the same state.

I have created a page template and assigned it to their respective pages. The problem I am running into is each page is pulling in the states from both post types.

How can I create a page which only shows the states for the defined post type?

$terms = get_terms ( 'prfx_states' );

	if (count($terms)) {
		echo "<ul>";
	}
	foreach ($terms as $term) {
		$wpq = array (
					'taxonomy' => 'prfx_states',
	            	'order' => 'ASC',
					'term' => $term->slug,
					'post_type' => 'prfx_installers',
				);
		$query = new WP_Query ($wpq);
		$article_count = $query->post_count;

		echo "<li>";
		if ($article_count) {
			echo "<a href=\"/states/".$term->slug."\">".$term->name."</a>";
		} else {
			echo $term->name;
		}
		echo "</li>";

	}
	if (count($terms)) {
		echo "</ul>";
	}