TWIN FALLS, Idaho (KMVT-TV) When Twin Falls began work on the Arsenic Compliance Project, the city needed to decrease standards from 50 parts per billion to ten parts per billion. The city wasn't the only one needing to comply.

Jeri Henry, Analyst, Department of Environmental Quality says, "we had approximately 60 systems that were impacted by the arsenic project, community water systems and non–public water systems had to comply with the new arsenic rule. Currently we have still 15 systems needing to comply."

Travis Rothweiler, Twin Falls City Manager says, "approximately 18 million of the 28.5 million dollar project focused on capital construction: lines, booster stations, etc."

"We're looking at $8 million of additional requirements at our waste water treatment facility to assist with meeting new NPDS requirements when it comes to solids and other types of issues," adds Rothweiler.

The city was able to delay a $5 million infiltration facility by building a series of wetlands.

Rothweiler says, "the standards of water when we deliver it to our citizens are perpetually changing and they're becoming more rigorous and more difficult. Those create new standards and new mandates."

Rothweiler says, there's never a really good time.

"Imposing a 28 million dollars fee in a period of one of the worst economic times in recent history to our residents is probably not something we would have done if we had a choice," states Rothweiler.

Henry says when it's a public health standard at stake, the government gives ample time to the communities.

"We have flexibility as a state to give more time and in fact, we have given more time for a majority of our systems that were impacted," adds Henry.

Still some positives came out of this project.

Rothweiler says, "that's because of an aggressive effort to capture Chobani."

One compliance project down, many more to go.