针对物理验证的已记录预测性服务管线分类审计：纽约州的全州研究
Auditing Recorded Predictive Lead Service-Line Classifications Against Physical Verification: A Statewide Study of New York
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中文总结 AI 辅助
该研究针对纽约州服务管线的预测模型分类与物理验证记录开展全州审计，发现纽约市等区域存在模型分类未记录铅材质、判定数据复制等问题，揭示了预测模型分类在管线材质判定中的偏差。
中文摘要 AI 辅助
根据美国《铅和铜规则修订案》，公用事业公司可通过预测模型而非直接检查来确定服务管线的材质。纽约州会按地址公布所使用的方法。几乎没有地址同时存在模型分类和物理验证，因此审计是在公用事业公司内的不同群体之间进行，而非配对地址之间。我们筛选了纽约州所有153个以这种方式对至少100个地址进行分类的地区。其中75个地区（占比49%，覆盖125990个地址，占筛选总数的57%）仅记录一个数值。仅零方差并不构成不当行为：75个地区中有68个要么与自身的验证结果匹配，要么样本量过小无法测试。7个地区被自身的工作人员结果所矛盾，其中6个超出了任何抽样解释的范围。5个是纽约市的行政区，作为一个系统提交数据；1个是距离550公里的东罗切斯特。纽约市是最大的案例：43215个地址的记录依据是预测模型，且所有这些地址的记录材质均为“已知其他”。该市在121779个地址上记录为“未知”，其中1880个已被挖掘，120692个记录为铅材质。在模型处理的地址中，这两类计数均为零，且该比率的95%上限为0.0085%。在纽约州其他地区，采用相同方法的地址中，176888个地址的12.21%记录为铅材质或“未知但可能为铅材质”，我们报告了该比较的局限性。经模型清除的群体更新，中位建造年份为1984年，而其他群体为1930年，建筑时代约占差距的三分之一，并非全部：在固定建筑时代的情况下，基于记录的分类在各时代发现铅材质的比例为4.3%至31.9%，物理验证为1.5%至14.5%，而模型在任何时代均未发现铅材质。6个考虑时代的估计器将预期的铅管线数量置于1150至1450之间。两项无需比较的发现：这些地址中有7782个位于1940年之前建造的建筑中，2025年的存档快照显示，公共侧的判定是从客户侧的模型输出复制而来的。
英文摘要
Under the US Lead and Copper Rule Revisions, a utility may determine a service line's material with a predictive model instead of inspecting it. New York State publishes, per address, which method was used. Almost no address carries both a model classification and a physical verification, so the check is between populations within a utility rather than paired addresses. We screen all 153 New York localities that classified at least 100 addresses this way. Seventy-five (49%), covering 125,990 addresses or 57% of those screened, record one value. Zero variance alone is not misconduct: 68 of the 75 match their own verification or have too little to test. Seven are contradicted by their own crews, six beyond any sampling explanation. Five are boroughs of New York City, which file as one system; one is East Rochester, 550 km away. New York City is the largest case: a predictive model is the recorded basis for 43,215 addresses, and on all of them the recorded material is "Known Other". The city records "Unknown" on 121,779 addresses, 1,880 already excavated, and lead on 120,692. In the model bucket both counts are zero, and the 95% upper bound on the rate is 0.0085%. Across the rest of New York the same method records lead or the hedge "Unknown but could be lead" on 12.21% of 176,888 addresses, a comparison whose weaknesses we report. The model-cleared population is newer, median year built 1984 against 1930, and construction era accounts for about a third of the gap and not the rest: holding era fixed, records-based classification finds lead at 4.3-31.9%, physical verification at 1.5-14.5%, the model in no era. Six era-aware estimators place the expected lead lines among them at 1,150-1,450. Two findings need no comparison: 7,782 of these addresses are in pre-1940 buildings, and the archived 2025 snapshot shows the public-side determination was copied from a customer-side model output.
