Clive tightens water use as regional nitrate levels spike, council backs stepped enforcement

Clive — The Clive City Council on June 12 backed a stepped enforcement and public-information campaign after Central Iowa Waterworks alerted member cities to unusually high nitrate levels in regional source waters, prompting the utility to ask communities to halt turf irrigation immediately.

City Manager Matt (city manager) told the council the most urgent, immediate action the region can take is to reduce lawn watering because turf irrigation accounts for a surge in short-term water demand that limits the utility’s ability to treat and blend source water to meet nitrate thresholds. He said the region’s “last and best chance to prevent crossing that threshold is stop watering your grass,” and urged residents to prioritize essential uses such as drinking and cooking.

Why it matters: Central Iowa Waterworks has limited short-term capacity to remove nitrates from the Raccoon and Des Moines rivers, staff said. That creates a public-health risk if nitrate concentrations rise above the U.S. Environmental Protection Agency’s standard for drinking water; city staff and the utility said reducing irrigation is the fastest way to free treatment capacity.

What the city will do: Staff described a three-step approach the council endorsed: 1) immediate, broad public messaging across mail, social media and the city website; 2) daily monitoring of irrigation-meter telemetry to identify likely irrigation activity and targeted electronic and phone notices to accounts with recent irrigation; and 3) prioritized enforcement for repeat noncompliance, including door tags and, as a last resort, irrigation shut-offs. The city said notices will be emailed and phoned where possible and that a web-based reporting tool will allow residents to submit location-tagged photos of suspected violations.

Council direction and limits: Council members pressed staff on fairness and enforcement logistics — for example, how to handle automated irrigation systems when owners are on vacation, newly sodded yards and athletic fields. Staff said the city will case-manage exceptions and temporarily hand-water critical new plantings where appropriate. Legal staff warned that complete shut-offs of household water are an extraordinary remedy; the city intends to target irrigation meters where possible and to use fines and fees for enforcement when disconnection is infeasible.

Timing: Staff proposed a rapid notification cycle using the prior 24-hour meter data as a trigger for outreach and said repeat violators could face shut-offs after an escalation sequence. Councilors asked staff to avoid weekend shut-offs and to wait until the next business day (Monday) to implement disconnections if necessary; staff agreed to begin notices and monitoring immediately and to report back daily.

Public-health and technical context: Staff said high nitrate readings reflect a combination of watershed conditions — land use in the upstream Raccoon and Des Moines watersheds, seasonal fertilizer and manure applications, and precipitation timing — rather than a simple shortage of raw water. Central Iowa Waterworks and county public-health officials will field technical questions on health implications, including precautions for households with infants, and the city will link to official guidance.

What residents can do now: The city urged residents to stop lawn irrigation, avoid nonessential outdoor water use, and report ongoing, visible irrigation through the city’s reporting page. Staff stressed the measures are temporary and intended to protect drinking-water safety while the utility works to stabilize nitrate concentrations.

Next steps: City staff will run daily irrigation-meter reports, begin targeted outreach to accounts that used irrigation in the last 24 hours, and return to the council with results and recommended enforcement actions as the situation evolves. The city emphasized coordination with Central Iowa Waterworks and county public-health authorities for technical and health guidance.