Water Quality Alert Update II: Levels of HAAs

The City of Lancaster continues to monitor the chlorine levels closely to prevent the HAAs from forming in the furthest reaches of our distribution system. The City continues our flushing program and weekly testing of the affected (Willow Street) area to ensure that we are maintaining the lower levels of HAA. The sampling results from last week of the affected site came in at 0.046mg/L and show we are still well under the EPA’s maximum contaminant level (MCL) of 0.060mg/L.

The required regulatory sampling for the first quarter of 2017 will be released at the end of February. At that time, the City will be able to determine if the running annual average for the past four consecutive quarters, falls below the MCL. Due to the high result from the fourth quarter of 2016, public notices might need to be sent again in March if the running annual average does not fall below the MCL even though our sample results noted above are well below the regulatory limits.

Updates for the water quality testing will continue to be posted to the City’s website.